@logical123, this happens to me as well, only I switch from user to user. In fact, the very first time I logged on as someone else, it was you! (I remember because I was a little freaked out by the whole experience and your username is easy to remember.)
This started after I deleted my stats profile. I wanted to fill it out again, only with less information; because the editing function is a bit cumbersome, I deleted it outright, expecting to be able to start over. Well, tough luck. The next time I tried to log in, I had access to logical123's information, but not mine. Right now, I'm logged in as mitchyy, whoever that is.