Creating non-premium accounts in launcher bug.

In the new launcher we can create non-premium accounts (but we can't delete them). These accounts can enter only Demo Worlds. I created one non-premium account (as you can see on a photo). After 3 minutes of playing on Demo World I left the game and changed account to premium. I tried to join two servers, but I was banned. (reason was: "multi-account" and "someone try to hack your account - new account activity"). I never joined these servers with new account. So: I hope you'll do something with that. This is BIG problem.