Some developer forgot what unique keys are...

I registered with username "Paulo" but apparently the username was already taken; so now I log in and I see the previous "Paulo" profile. and I can't edit my own profile unless I go directly to:
http://hi.im/user/541 which I had to figure out

Please change my username to "paulodelgado" (no quotes) to solve the dup and add some unique keys to the users table... sheesh.