I'll take a stab at it and I could be wrong as I have noticed this too.
(I'm on BIS)
I think that when you delete an email off of the BB, and then wirelessly reconcile it, it moves the message to your deleted items folder on the webclient. That's all good. If you go to Messages --- Wheel Click ---Options----Email Reconciliation --- Wheel Click you will see an option to purge deleted items. I usually do this once a week or so.
Hope this helps.
Last edited by justin.culp; 03-07-2006 at 09:29 AM..