Don't understand Empire Poker...

[hackers238]

So when I sign in with my password and everything, i am Hackers238. I put

Hackers238
Password

in and sign in. Then the first time I sat at a table, it said my name was taken, and i had to choose a new one. So after much thought, I picked hackers239. But I don't understand, I still log in as hackers238, yet when i sit down my name comes up as hackers239.

If I wanted TP to transfer the 25$ to empire for posting here, who should he send it to, hackers238, or 239?

and why does it do this?