MissCarrieA7x

My fiancé signed in to his Xbox live account and ALL of MY halo reach stuff was on his account and my account completely restarted. (he received my call sign, spartan upgrades, game saves, etc) he even completed the campaign on his account (and I hadn't) and it had erased all of his campaign progress (but not achievements and it even says he has completed the game on legendary but he has none of the levels unlocked like he used to). Is there any way to fix this? Has anyone heard of anything like this? thanks!