I recently upgraded my ipad2's ios to 6. Since then, I noticed that whenever I upgrade the apps that I have my brother's apple id pops up and NOT MY APPLE ID. When I looked at the settings, it shows that the apple id in use is mine. I tried signing it out and in again just to refresh the system. But when I tried upgrading the apps, my brother's apple id pops again. Even using iMessenger, it's his apple id that's in use though my apple id is the one signed in. Help please!