On my IPad I have at least 2, and sometimes 4, entries for every contact that I have on my IMac Address Book. I have deleted all the entries on the IPad when I sync and then when I sync again the entries reappear on the IPad but still there are either 2 or 4 of everything. The address book on the IMac is fine but how do I correct the other problem on the IPad without having to delete each one manually?