Gameplay Lag and out of sync

Hi I have noticed that some of the my games when created and loaded on the iPhone run out of sync and even lag? Is there a limit to the memory that you can have loaded per game? I have to remove scenes to fix the issue, but its not ideal as it plays perfect within GameSalad creator.
Comments
The very first time you run your game after install on a 3gs is al
most the same as older models. 2nd time run on 3gs is a lot faster.
So, if it runs on an old device then you will be ok.
I'm sure this will happen eventually. Remember it's Beta