not logging in consistently and not redirecting to jomsocial

I was just able to log in with my FB user and it redirected properly. Have you tried with multiple users / browsers?

I also notice there's a Javascript error on your page. "Uncaught ReferenceError: SobiPro is not defined" We always advise on correcting these first when you're seeing strange behavior with Facebook login. If you're still encountering issues after resolving this error, please let us know more specific details on how to reproduce.

-Melissa