World In App Purchase question: When I go from the 'world selection UI' to one of the free world UI's, then back...the ‘purchase' world is locked as it should be. But when I go from the 'world selection UI' to one of the free world UI's and continue to that free world, then back to home and go to the 'world selection UI', the 'Purchase' world is unlocked when it should be locked. Any suggestions? The 'purchase world' is a Lock Button, and the Unlock Button is in the World UI. I have it set up with a main world select UI --> then a single world UI --> the the world. I set it up like this so each world could have different music. Taking out the middle UI does nothing.