Armor switched to default

I just signed into reach and all of my armor was reset, and every piece of armor i had unlocked was “new”. I still have all the armor i bought so it’s no big deal, but I wanted to know if anyone has ever experienced this or could tell me what happened? I even got a prompt asking me if I was male or female as if it were the first time I played reach.

Oh and I changed my xbl account password about an hour before this happened if that could have anything to do with it.