I seem to be having the same problem. I sent an e-mail to tech before I found this forum and registered. *sigh* I think it's because of multiple accounts because of how the old site was sectioned off and you needed to log-in to multiple places to read fics in different fandoms.
I'm just happy my profile didn't get deleted. I checked. So right now, I'm not deleted out of the system but just lost. Which means I can be found. So yay.