Alternate account problem.

[ReXii]

Not in the least bit weird
Threads like this are so normal in fact
*Cough*

 

[Vision]

Have a mod or a admin who has rights to this forum to be able to cross check user names with IP's. That will probably be the easiest way. Other wise check browser history, narrow the search to the times you know you weren't on NB. You can check your cookies as well. If you are on a firewall you can access all history from that too.