Kardashian game / Game Center

I downloaded the kardashian game a while back and I started off with one account. When my sister downloaded it it she logged into the Game Center account associated with our Apple ID. Because we share the same Apple ID it signed in on my iphone. When I would log into my kardashian game it would say another account is saved on iCloud log in don't log in. I avoided it for some while until I accidentally hit log in and it logged into my sisters avatar. I closed the app and deleted it from my cache and then went back in. It asked the same question again and my avatar came back with 3 coins. I told my sister about this great way of earning coins and she pressed log in on my kardashian game. The only thing is that her avatar is gone and when you click log in it will be my avatar just at different stages of the game ( one is my avatar at level b and the other is my old avatar at level a ) .

If you know a way of getting my sisters back can you please tell me? I'm sorry it's a long post!

Thank you for taking the time to answer much appreciated

Anyone who plays that game is dumber then a kardashian