Index: trunk/ippTools/src/difftool.c
===================================================================
--- trunk/ippTools/src/difftool.c	(revision 29923)
+++ trunk/ippTools/src/difftool.c	(revision 29958)
@@ -483,5 +483,5 @@
     psFree(where);
 
-     psStringAppend(&query, "\nORDER by priority DESC, diff_id");
+     psStringAppend(&query, "\nORDER by priority DESC, diff_id, skycell_id");
 
     // treat limit == 0 as "no limit"