2. Account Problems ! iOS 7 iPhone 5

Hello!
I have 2 gamecenter accounts and 2 clash of clans accounts,
So i have 2 emails, 1 Email for 1 account.

I log in gamcenter with email 1. then i go into CoC and i am in my 1. account.
(Now i want to change to my 2. account)

I go into gamecenter and Log in with my 2. Email and go into CoC. USUALLY it says " Problem ! This gamecenter Problem! Email is not Connected to this account. Then i fill in BESTÄTIGEN (german) and the game restarts and i am With my 2. account in CoC.

But since Last Werk the "Problem! Gamecenter account! Email is mit connectet to this account" doesn't come! So i am in the account and cant change it..

Please tell me what i can do.. Thx

I am sorry but this belongs in the bugs and problems sub forum.

Having 2 accounts on the same device is againts ToS (Terms of Service) but this belongs in Bugs & Problem