When I delete contact item (phone, email, etc), the item deletes but reappears

In the People app, if I delete a portion of a contacts information (like their address or phone number) the information will disappear for a time, but the next time I view my contacts, the information is back. Plus, I noticed that no changes were made to the contact's information in gmail, but it should have been; the phone is set to sync automatically with my gmail account. HTC DNA.