Yeah I think I experienced something similar and had to re-register with a different e-mail, although I had genuinely forgot my password. The UI is rubbish and the modification rules were crippling(it cost you 5 player modifications to change the captain), I didn't find it very fun at all. It's amazing how much a good UI brings to a fantasy game.
Incidently did you enter a team in the Free EPL fantasy league in the Telegraph I linked to in here? That UI is so sweet.