Steam authenticated wrong account automatically (my fault, but ...)

[tandcemerson]

I played a medium length of time ago and had two accounts, although I can't remember why. Anyways, when I saw the game on Steam, it brought back good memories so I downloaded and logged in. I used my defacto account name and it took about 3 tries to remember my password. When I got to the character selection, it was empty and I remembered that I had two accounts. I logged back out and logged in using my original account with email/password. Unfortunately, Steam is now locked into the empty account and I see no way to reassign Steam to the right login.

Any advice?