Tasks not disappearing from UWL on Auto refresh

Hi,

I have raised a START DEADLINE critical exception on one human activity to send the mail to the owner if he does not act in given time.

I require that only the mail shoud get triggered but task must remain there so that he can know and act on the task.I have linked this automated activity of sending mail back to the human activity.

Problem:

The mail is going.The task is coming back in UWL.But i can still see the previous task in the UWL.Previous tasks are not disappearing after auto refresh but when i refresh it manualy Then previous tasks get disappeard and only current remains.

version of NWDS : SAP Enhancement Package 1 for SAP NetWeaver Developer Studio 7.1 SP04 PAT0000

Regards

Govind