Help me with TP2 contacts

[Brian23]

I have been using a TP2 for the past year and recently got a samsung moment. I had sprint transfer all of my contacts to the moment in store. They stayed for a little while then more than half "fell off". I then bluetoothed the contacts that fell off back to the phone one by one. The contacts were back in the moment. I then synced my moment with gmail contacts to try and back them up but the ones that fell off and then bluetoothed did not show up on my contacts for gmail.... just the ones that never fell off. Then about an hour later I checked and the ones that I bluetoothed from TP2 to Samsung moment fell off again (once after sprint transferred and the once after bluetoothed). The original 46 that never fell off were still there and they transferred to my gmail contacts. What gives with the ones falling off and not syncing? Can someone please help?