I get the same problem too. When I go to other websites without logging out or opening up another web browser screen and I try logging back in it doesn't do anything

But when I go into forums I'm already there!
You can either log out after each visit when you want to browse other sites or if you don't log out and you go to other websites, you can try clicking the refresh button while in the log in screen and see if you're already in.
I hope I didn't just confuse anyone

*re-reading everything*