diff --git a/bin/diamond b/bin/diamond
index 79c3c03e..0ae20698 100755
Binary files a/bin/diamond and b/bin/diamond differ
diff --git a/src/ChangeLog b/src/ChangeLog
index c58ddbdf..fae77fe0 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,9 @@
+[0.7.8]
+- fixed a bug that could produce an incorrect sort order of HSPs
+
+[0.7.7]
+- fixed a number formatting error in the SAM output format
+
 [0.7.6]
 - fixed a formatting error in CIGAR strings
 
diff --git a/src/align/align_queries.h b/src/align/align_queries.h
index f28cb1da..702b113f 100644
--- a/src/align/align_queries.h
+++ b/src/align/align_queries.h
@@ -107,9 +107,9 @@ void align_queries(const Trace_pt_buffer<_locr,_locl> &trace_pts, Output_stream*
 		log_stream << "Processing query bin " << bin+1 << '/' << trace_pts.bins() << '\n';
 		task_timer timer ("Loading trace points", false);
 		trace_pts.load(v, bin);
-		v.init();
 		timer.go("Sorting trace points");
 		merge_sort(v.begin(), v.end(), program_options::threads());
+		v.init();
 		timer.go("Computing alignments");
 		if(ref_header.n_blocks > 1) {
 			Align_context<_val,_locr,_locl,Temp_output_buffer<_val> > context (v, output_file);
diff --git a/src/basic/const.h b/src/basic/const.h
index b698df36..941773e0 100644
--- a/src/basic/const.h
+++ b/src/basic/const.h
@@ -25,7 +25,7 @@ struct Const
 {
 
 	enum {
-		build_version = 56,
+		build_version = 57,
 		build_compatibility = 52,
 		daa_version = 0,
 		seedp_bits = 10,
@@ -46,7 +46,7 @@ struct Const
 
 };
 
-const char* Const::version_string = "0.7.7";
+const char* Const::version_string = "0.7.8";
 const char* Const::program_name = "diamond";
 const char* Const::id_delimiters = " \a\b\f\n\r\t\v";
 
diff --git a/src/basic/options.cpp b/src/basic/options.cpp
index 96fa122a..e8d0e6cc 100644
--- a/src/basic/options.cpp
+++ b/src/basic/options.cpp
@@ -82,6 +82,7 @@ double		toppercent;
 string		daa_file;
 string		output_format;
 bool		forwardonly;
+unsigned	fetch_size;
 
 Aligner_mode aligner_mode;
 Command command;
diff --git a/src/basic/options.h b/src/basic/options.h
index 49a168d7..71f3273c 100644
--- a/src/basic/options.h
+++ b/src/basic/options.h
@@ -83,6 +83,7 @@ namespace program_options
 	extern string	output_format;
 	extern string	output_file;
 	extern bool		forwardonly;
+	extern unsigned fetch_size;
 
 	typedef enum { fast=0, sensitive=1, very_sensitive=2 } Aligner_mode;
 	extern Aligner_mode aligner_mode;
diff --git a/src/basic/setup.h b/src/basic/setup.h
index d105387d..bcd1e1fd 100644
--- a/src/basic/setup.h
+++ b/src/basic/setup.h
@@ -129,15 +129,10 @@ void setup_search_params(pair<size_t,size_t> query_len_bounds, size_t chunk_db_l
 
 	const double b = po::min_bit_score == 0 ? score_matrix::get().bitscore(po::max_evalue, ref_header.letters, query_len_bounds.first) : po::min_bit_score;
 
-	if(query_len_bounds.second <= 40) {
-		po::set_option(po::min_identities, 10u);
-		po::set_option(po::min_ungapped_raw_score, score_matrix::get().rawscore(std::min(27.0, b)));
-	} else {
-		po::set_option(po::min_identities, 9u);
-		po::set_option(po::min_ungapped_raw_score, score_matrix::get().rawscore(std::min(23.0, b)));
-	}
+	po::set_option(po::min_identities, 18u);
+	po::min_ungapped_raw_score = score_matrix::get().rawscore(std::min(po::min_ungapped_raw_score == 0 ? 19.0 : po::min_ungapped_raw_score, b));
 
-	if(query_len_bounds.second <= 80) {
+	if(query_len_bounds.second <= 128) {
 		const int band = po::read_padding<_val>(query_len_bounds.second);
 		po::set_option(po::window, (unsigned)(query_len_bounds.second + band));
 		po::set_option(po::hit_band, band);
@@ -145,9 +140,10 @@ void setup_search_params(pair<size_t,size_t> query_len_bounds, size_t chunk_db_l
 	} else {
 		po::set_option(po::window, 40u);
 		po::set_option(po::hit_band, 5);
-		po::set_option(po::min_hit_score, score_matrix::get().rawscore(std::min(29.0, b)));
+		po::min_hit_score = score_matrix::get().rawscore(std::min(po::min_hit_score == 0 ? 19.0 : po::min_hit_score, b));
 	}
 	log_stream << "Query len bounds " << query_len_bounds.first << ' ' << query_len_bounds.second << endl;
+	log_stream << "Minimum bit score = " << b << endl;
 	log_stream << "Search parameters " << po::min_ungapped_raw_score << ' ' << po::min_hit_score << ' ' << po::hit_cap << endl;
 }
 
diff --git a/src/basic/shape.h b/src/basic/shape.h
index b8f2cce8..3ea3bff6 100644
--- a/src/basic/shape.h
+++ b/src/basic/shape.h
@@ -97,6 +97,7 @@ struct shape
 			unsigned r = Reduction<_val>::reduction(l);
 			f += background_freq[r];
 			s *= Reduction<_val>::reduction.size();
+			//s *= 5;
 			s += uint64_t(r);
 		}
 		if(use_seed_freq<_val>() && f > program_options::max_seed_freq) return false;
diff --git a/src/main.cpp b/src/main.cpp
index 209195aa..9aa5ba84 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -105,12 +105,14 @@ int main(int ac, const char* av[])
         	("window,w", po::value<unsigned>(&program_options::window)->default_value(0), "window size for local hit search")
         	("xdrop", po::value<int>(&program_options::xdrop)->default_value(20), "xdrop for ungapped alignment")
         	("gapped-xdrop,X", po::value<int>(&program_options::gapped_xdrop)->default_value(20), "xdrop for gapped alignment in bits")
-        	("ungapped-score", po::value<int>(&program_options::min_ungapped_raw_score)->default_value(0), "minimum ungapped raw alignment score to continue local extension")
+        	("ungapped-score", po::value<int>(&program_options::min_ungapped_raw_score)->default_value(0), "minimum raw alignment score to continue local extension")
         	("hit-band", po::value<int>(&program_options::hit_band)->default_value(0), "band for hit verification")
         	("hit-score", po::value<int>(&program_options::min_hit_score)->default_value(0), "minimum score to keep a tentative alignment")
         	("band", po::value<int>(&program_options::padding)->default_value(0), "band for dynamic programming computation")
         	("shapes,s", po::value<unsigned>(&program_options::shapes)->default_value(0), "number of seed shapes (0 = all available)")
-        	("index-mode", po::value<unsigned>(&program_options::index_mode)->default_value(0), "index mode (1=4x12, 2=16x9)");
+        	("index-mode", po::value<unsigned>(&program_options::index_mode)->default_value(0), "index mode (1=4x12, 2=16x9)")
+        	("fetch-size", po::value<unsigned>(&program_options::fetch_size)->default_value(4096), "trace point fetch size")
+        	;
         	//("no-traceback,r", "disable alignment traceback");
         	//("compress-temp", po::value<unsigned>(&program_options::compress_temp)->default_value(0), "compression for temporary output files (0=none, 1=gzip)");
 
@@ -168,10 +170,14 @@ int main(int ac, const char* av[])
         } else if (program_options::command == program_options::makedb && vm.count("in") && vm.count("db")) {
         	if(vm.count("block-size") == 0)
         		program_options::chunk_size = 2;
+#ifdef EXTRA
         	if(program_options::db_type == "nucl")
         		make_db(Nucleotide());
-        	else
+        	else if(program_options::db_type == "prot")
         		make_db(Amino_acid());
+#else
+        		make_db(Amino_acid());
+#endif
         } else if ((program_options::command == program_options::blastp
         		|| program_options::command == program_options::blastx
 #ifdef EXTRA
diff --git a/src/output/join_blocks.h b/src/output/join_blocks.h
index 76a03529..9e85d3b7 100644
--- a/src/output/join_blocks.h
+++ b/src/output/join_blocks.h
@@ -37,7 +37,7 @@ void join_blocks(unsigned ref_blocks, DAA_output &master_out, const vector<Temp_
 	Block_output::Iterator r;
 	for(unsigned i=0;i<ref_blocks;++i) {
 		files.push_back(new Block_output (i, tmp_file[i]));
-		if(files.back()->next(r, std::numeric_limits<unsigned>::max()))
+		if(files.back()->next(r, std::numeric_limits<unsigned>::max(), std::numeric_limits<unsigned>::max()))
 			records.push_back(r);
 	}
 	std::make_heap(records.begin(), records.end());
@@ -63,7 +63,7 @@ void join_blocks(unsigned ref_blocks, DAA_output &master_out, const vector<Temp_
 		}
 		const bool same_subject = n_target_seq > 0 && b == block && next.info_.subject_id == subject;
 		if(program_options::output_range(n_target_seq, next.info_.score, top_score) || same_subject) {
-			//printf("q=%u s=%u n=%u ss=%u\n",query, next.info_.subject_id, n_target_seq, same_subject);
+			//printf("q=%u s=%u n=%u ss=%u\n",query, next.info_.subject_id, n_target_seq, same_subject, next.info_.score);
 			DAA_output::write_record(buf, next.info_);
 			statistics.inc(Statistics::MATCHES);
 			if(!same_subject) {
@@ -76,7 +76,7 @@ void join_blocks(unsigned ref_blocks, DAA_output &master_out, const vector<Temp_
 
 		std::pop_heap(records.begin(), records.end());
 		records.pop_back();
-		if(files[b]->next(r, subject)) {
+		if(files[b]->next(r, subject, query)) {
 			records.push_back(r);
 			std::push_heap(records.begin(), records.end());
 		}
diff --git a/src/output/output_file.h b/src/output/output_file.h
index e61128b8..5c192109 100644
--- a/src/output/output_file.h
+++ b/src/output/output_file.h
@@ -35,16 +35,18 @@ struct Block_output : public Buffered_file
 		bool same_subject_;
 		Intermediate_record info_;
 		bool operator<(const Iterator &rhs) const
-		{ return info_.query_id > rhs.info_.query_id || (info_.query_id == rhs.info_.query_id && (!same_subject_ || info_.score < rhs.info_.score)); }
+		{ return info_.query_id > rhs.info_.query_id ||
+				(info_.query_id == rhs.info_.query_id && (rhs.same_subject_ ||
+						(!rhs.same_subject_ && info_.score < rhs.info_.score))); }
 	};
 
-	bool next(Iterator &it, unsigned subject)
+	bool next(Iterator &it, unsigned subject, unsigned query)
 	{
 		if(this->eof())
 			return false;
 		it.info_.read(*this);
 		it.block_ = block_;
-		it.same_subject_ = it.info_.subject_id == subject;
+		it.same_subject_ = it.info_.subject_id == subject && it.info_.query_id == query;
 		return true;
 	}
 
diff --git a/src/search/trace_pt_buffer.h b/src/search/trace_pt_buffer.h
index c6c38811..329038ae 100644
--- a/src/search/trace_pt_buffer.h
+++ b/src/search/trace_pt_buffer.h
@@ -44,6 +44,34 @@ struct Trace_pt_list : public vector<hit<_locr,_locl> >
 	void init()
 	{
 		pos_ = this->begin();
+		p_.clear();
+		p_.push_back(0);
+		idx_ = 0;
+		const unsigned c = query_contexts();
+		/*typename vector<hit<_locr,_locl> >::iterator i = this->begin()+program_options::fetch_size;
+		for(; i < this->end(); i=std::min(i+program_options::fetch_size, this->end())) {
+			const unsigned q = i->query_/c;
+			for(; i<this->end() && i->query_/c == q; ++i);
+				//printf("%lu %u %u\n", i-this->begin(), i->query_/c, q);
+			//printf("%lu\n",i - this->begin());
+			//std::terminate();
+			p_.push_back(i - this->begin());
+		}*/
+		/*typename vector<hit<_locr,_locl> >::iterator i = this->begin();
+		unsigned total=0,count=1;
+		for(; i < this->end();) {
+			unsigned n=0;
+			const unsigned min_size = 4*total/count/5 + 1;
+			for(;i<this->end() && n<min_size;) {
+				const unsigned q = i->query_/c;
+				for(; i<this->end() && i->query_/c == q; ++i)
+					++n;
+			}
+			++count;
+			total += n;
+			p_.push_back(i - this->begin());
+		}
+		p_.push_back(i - this->begin());*/
 	}
 	struct Query_range
 	{
@@ -52,15 +80,28 @@ struct Trace_pt_list : public vector<hit<_locr,_locl> >
 		{ }
 		bool operator()()
 		{
+
 			begin = parent_.pos_;
-			end = std::min(begin + 4096, parent_.end());
+			//end = std::min(begin + 4096, parent_.end());
+			end = std::min(begin + program_options::fetch_size, parent_.end());
 			if(end >= parent_.end())
 				return false;
 			const unsigned c = query_contexts(), q = end->query_/c;
 			for(; end<parent_.end() && end->query_/c == q; ++end);
+				//printf("%lu %u %u\n", end-parent_.begin(), end->query_/c, q);
 			parent_.pos_ = end;
+			//printf("%lu\n",end - parent_.begin());
+			//printf("%lu %lu\n",begin-parent_.begin(),end-parent_.begin());
 			return end < parent_.end();
 		}
+		/*bool operator()()
+		{
+			begin = parent_.begin()+parent_.p_[parent_.idx_];
+			end = parent_.begin()+parent_.p_[parent_.idx_+1];
+			printf("%lu %lu %lu\n", parent_.p_[parent_.idx_], parent_.p_[parent_.idx_+1], parent_.p_[parent_.idx_+1]-parent_.p_[parent_.idx_]);
+			++parent_.idx_;
+			return parent_.idx_ < parent_.p_.size()-1;
+		}*/
 		typename Trace_pt_list::iterator begin, end;
 	private:
 		Trace_pt_list &parent_;
@@ -69,6 +110,9 @@ struct Trace_pt_list : public vector<hit<_locr,_locl> >
 	{ return Query_range (*this); }
 private:
 	typename vector<hit<_locr,_locl> >::iterator pos_;
+	vector<size_t> p_;
+	unsigned idx_;
 };
 
 #endif /* TRACE_PT_BUFFER_H_ */
+