The family has two 4S phones and an Ipad. Itunes backs up the units then synchronizes the one attached. We use the same itunes account on each. My question deals with sync'n the contacts list, but applies to all files: 1)Is there a pecking order? or does Itunes look at all 3 units' backups and merge the out of sync data from each to each? 2)Do I need to backup & sync the three units twice (A,B,C then B & A again) to level all combinations of sync? Thanks.