diff --git a/src/main/java/io/fusionauth/domain/GroupMember.java b/src/main/java/io/fusionauth/domain/GroupMember.java
index f6a55889..d2349869 100644
--- a/src/main/java/io/fusionauth/domain/GroupMember.java
+++ b/src/main/java/io/fusionauth/domain/GroupMember.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2022, FusionAuth, All Rights Reserved
+ * Copyright (c) 2018-2024, FusionAuth, All Rights Reserved
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -38,6 +38,10 @@ public class GroupMember implements Buildable<GroupMember> {
 
   public ZonedDateTime insertInstant;
 
+  /**
+   * Deprecated since 1.52.0 (Aug 2024). Planned removal by end of 2024
+   */
+  @Deprecated
   public User user;
 
   public UUID userId;
diff --git a/src/main/java/io/fusionauth/domain/search/GroupMemberSearchCriteria.java b/src/main/java/io/fusionauth/domain/search/GroupMemberSearchCriteria.java
index 2a6e1438..09fd557c 100644
--- a/src/main/java/io/fusionauth/domain/search/GroupMemberSearchCriteria.java
+++ b/src/main/java/io/fusionauth/domain/search/GroupMemberSearchCriteria.java
@@ -1,5 +1,17 @@
 /*
- * Copyright (c) 2022, FusionAuth, All Rights Reserved
+ * Copyright (c) 2022-2024, FusionAuth, All Rights Reserved
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+ * either express or implied. See the License for the specific
+ * language governing permissions and limitations under the License.
  */
 package io.fusionauth.domain.search;
 
@@ -41,11 +53,14 @@ public Set<String> supportedOrderByColumns() {
 
   @Override
   protected String defaultOrderBy() {
-    return "insertInstant ASC";
+    // All memberships for a given group share an insertInstant because they are recreated each time
+    // Add userId to provide consistent ordering within a group. The groupId ordering ensures consistency
+    // for a single user's memberships across multiple groups if they happen to have the same insertInstant.
+    return "insertInstant ASC, userId ASC, groupId ASC";
   }
 
   static {
-    SortableFields.put("id", "id");
+    SortableFields.put("id", "gm.id");
     SortableFields.put("insertInstant", "gm.insert_instant");
     SortableFields.put("groupId", "gm.groups_id");
     SortableFields.put("tenantId", "g.tenants_id");