It might be a bug and I'm not sure how to reverse that, but here's an idea: Perhaps you can create a new administrator account, verify your settings are working properly and port your data over to the new account, gaining access that way. I've been locked out my OS's in the past, that trick has worked sometimes and I'm not the only one apparently:
It may not work, but if you have no other option, might be worth trying. Best of luck in any case.