Just posted something at the exact same time as you BMF. FWIW, what you're experiencing with the BW Boards (or any Insiders' board) is normal. If you log in there while already logged in here, you will be logged off here. Vice versa is also true.

I don't know why they didn't better handle the upgrade of Insiders accounts to global ezBoard accounts, as it would have made everything easier. As you can see from The Insiders' ezBoard help forum, there isn't much attention to detail on their end...

insiders2.ezboard.com/bcustomerservice