"An Error Has OccurredYou already have a hosting account, use it."
I click "Go to account panel" and am brought to the screen telling me to enter my cPanel name ("Link your hosting account").
Edit:
And trying to link "torrobinson" says "the hosting username you specified does not exist."
Once you clicked the logout - did you go try and sign up or did you log back in here and then go sign up?
Corey was saying to logout / clear cookies and temp files before going to try and sign up. If that doesn't work, then login here again and post in this thread.