Absolutely friggin' ridiculous

[Kaseira]

The whole thing sounds to me like a Thayan plot from someone underneath you overthrowing your position so they can take up the reign of commander.

Rodderick Hughes with the Toupe in the Enclave, anyone?

[Rhifox]

Try installing the game from a friend's keys and see if you're able to log on with your old account. I don't believe NWN2 requires the install key to match the online account key.