Funny enough, that is exactly how I found the problem. I created a www account (I am almost ashamed to say that was my first instinct, try to break the system before you decide the system is worthy of your use). I ended up logging out and I couldn't log back in with the same password. In hindsight, someone must have created another www account after I did and before I tried to login again. I then tried creating another www account and it worked. I then logged out and tried registering with a different username twice just in case www was a special case. The same thing happened, the second account just replaced the first account.
