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public/app/store/Aliases.js

@@ -3,6 +3,12 @@ Ext.define('MyMA.store.Aliases', {
     requires: 'MyMA.model.Aliases',
     model: 'MyMA.model.Aliases',
     groupField: 'alias',
-    remoteSort: true,
+	/**
+	 * There is an undocumented incompatibility between a certain Store configuration and the Grouping Feature. 
+	 * Namely, you cannot have a Store with "remoteSort=true" while using the Grouping Feature. 
+	 * The problem is that the Store will be sorted as per the server reponse, 
+	 * while the Grouping Feature will cause the view to be sorted as per the groupings.
+	 */
+    remoteSort: false,
     pageSize: 100
 });