It's not really a 'bug', but I think it has to be adjusted:
Because of the introduction of Utopia
Multiple Teams
It is against BuzzerBeater rules to own or operate more than one team or account for any circumstances. We have sophisticated tools for detecting this, and when you are caught, all of your accounts will be permanently banned without warning. You are not allowed to sign up for a second team while you already have access to a team.
and I guess there will be other things too.