Not sure. You could pull battery and resend service books. Don't know if that has ANYTHING to do with your problem. Maybe something in the Outlook settings. Lately when I sync calendar some of my old todo items with a recurrence are put back on the calendar going back in time, even though they were deleted from the BB and PC prior to sync. The ones that haven't come due yet are unaffected. Not sure why.
Phones Owned: Nokia 6200; Nokia 6126 2ea; 8700g; 8900; Carrier-Cincinnati Bell: Future Bold Owner