This always works for me, similar problem, every now and then my calendar entries doubles. Use desktop Manager, start it up and plug the phone in. Go to Backup and Restore, Advanced. It will ask to use Mass Data Mode, answer yes. You should see two columns, the right column is populated, the left column is blank. Scroll down the right column to Address Book. There should be one that says Address Book, and below that Address Book All. If both numbers are the same, stop, this will not help you. If they are different, approximately twice as many in Address Book All, continue. Highlight address book, then click the arrow between the columns pointing left, and move the address book there. Highlight the address book all, and click the button below that says clear. Highlight the address book in the left column, and click that arrow pointing right to place it back on your phone. Back out to the main menu. Now you should only have one contact for each person, not two.
This will also work for duplicate calendar entries.
Hope this helps.
07-21-10 08:50 PM