Index: lams_tool_sbmt/src/java/org/lamsfoundation/lams/tool/sbmt/web/ExportServlet.java
===================================================================
diff -u -rc7c69cdbf6bc67b279df76ca42165d33ae454c58 -rca758bf56bb0e055c635f4b4252daf28d12811b2
--- lams_tool_sbmt/src/java/org/lamsfoundation/lams/tool/sbmt/web/ExportServlet.java	(.../ExportServlet.java)	(revision c7c69cdbf6bc67b279df76ca42165d33ae454c58)
+++ lams_tool_sbmt/src/java/org/lamsfoundation/lams/tool/sbmt/web/ExportServlet.java	(.../ExportServlet.java)	(revision ca758bf56bb0e055c635f4b4252daf28d12811b2)
@@ -74,9 +74,7 @@
 	private class StringComparator implements Comparator<String>{
 		public int compare(String o1, String o2) {
 			if(o1 != null && o2 != null){
-				int c = o1.compareTo(o2);
-				//to ensure String does not overlap even they have duplicated name.
-				return c==0?1:c;
+				return o1.compareTo(o2);
 			}else if(o1 != null)
 				return 1;
 			else
Index: lams_tool_sbmt/src/java/org/lamsfoundation/lams/tool/sbmt/web/MonitoringAction.java
===================================================================
diff -u -r57cfee7c8588098f1a856bc78093cb10aa2b1482 -rca758bf56bb0e055c635f4b4252daf28d12811b2
--- lams_tool_sbmt/src/java/org/lamsfoundation/lams/tool/sbmt/web/MonitoringAction.java	(.../MonitoringAction.java)	(revision 57cfee7c8588098f1a856bc78093cb10aa2b1482)
+++ lams_tool_sbmt/src/java/org/lamsfoundation/lams/tool/sbmt/web/MonitoringAction.java	(.../MonitoringAction.java)	(revision ca758bf56bb0e055c635f4b4252daf28d12811b2)
@@ -94,9 +94,7 @@
 	private class SessionComparator implements Comparator<SessionDTO>{
 		public int compare(SessionDTO o1, SessionDTO o2) {
 			if(o1 != null && o2 != null){
-				int c = o1.getSessionName().compareTo(o2.getSessionName());
-				//to ensure session can be put into map even they have duplicated name.
-				return c==0?1:c;
+				return o1.getSessionName().compareTo(o2.getSessionName());
 			}else if(o1 != null)
 				return 1;
 			else