Now that ClusterStorm supports both OpenFeint and Game Center, there are a few things you need to take into consideration when using multiple accounts on a single device.

First, your OpenFeint account will by default login as the last user. Your Game Center account is not related to OpenFeint, and is controlled by the Game Center app.

You should always log out of Game Center before running a OpenFeint/Game Center app unless you know that the account you wanted synced with your Game Center account is the same one currently logged in to OpenFeint.

Otherwise, when you login to ClusterStorm OpenFeint may sync your scores and achievements to that Game Center account.