When I first got my iphone 3 months ago, I started using the option to sync contacts from Yahoo to my phone. It seemed to work well at first, but when I looked at my contact list I noticed that I now have a huge list of my contacts with each individual contact listed 4 times with the same addresses. I stopped syncing the two now, but today I realized that the iPhone had also done something to my yahoo address book when I synced it and my list is now full because all of my friends' emails are listed at least 30 times each! Is there a way I can fix this without having to go through each contact and delete 50 names each time?