I don't know how it happened, but when I tried to log in, I couldn't so I reset my password. When I did, it said my log in was 'nutrition' but I don't remember selecting that name.
I am "bulldog" (bulldog559 at bb.com).
The "old" bulldog hadn't logged in in a while and had an inactive email address so he's bumped and you're the new and improved BullDog. Feel free to move around area codes now without the need to ask for a name change. :)