I bought a used XboX360 yesterday. I only kept one username on there since he had a bunch of full games in memory.
I made a new account, put my credit card info in it. Paid for 3 months Live and 49.99 worth of microsoft points and started buying some games for my new account. Problem is, at some points the xbox asked me to confirm it needed to disconnect. I confirmed, it disconnected and the somewhere betewwn then and now it connected back with the original account and now all my microsoft points are on that account and the games I bought belong to that account... WTF... I need to change my credit card info from that account ASAP since I dont know if the guy will log in elsewhere and notice he has some microsoft points and bill my credit card for more... HHEEELLP