Index: /tags/ipp-20120626/PS-IPP-PStamp/lib/PS/IPP/PStamp/Job.pm
===================================================================
--- /tags/ipp-20120626/PS-IPP-PStamp/lib/PS/IPP/PStamp/Job.pm	(revision 34210)
+++ /tags/ipp-20120626/PS-IPP-PStamp/lib/PS/IPP/PStamp/Job.pm	(revision 34211)
@@ -342,4 +342,6 @@
         die "tess_id and component are required for byskycell" if !$tess_id or ! $skycell_id;
         $command .= " -tess_id $tess_id -skycell_id $skycell_id";
+        # remove duplicate runs for the same exposure.
+        $filter_runs = 1;
     } else {
         # this should be caught by caller