Macros that play another macro via PlayMacro() continue to play for a period of time after calling PlayMacro().

[Timorio]

ClassicAssist Version: 0.3.285.312

This can be demonstrated with the following macro, which will iterate its for loop an indeterminate number of times before finally stopping:

PlayMacro( 'Test2' )
for x in range( 0, 10 ):
	print x

[bittiez]

I'm pretty sure this is intentional, assuming you have one of the macros set to Run In Background