Jim can sit wherever he wants. I dont see the problem. This project is exciting for him. Of course he is proud of Big Bang, big bang give him everything, but he wants to grow as an actor. He wants to make movies, he wants to participate in other projects. Is this bad? I think is good for him. Everyone knows him as Sheldon, he is proud of that, but how many people knows him as the actor he is?
Kaley knew exactly where Jim sit. Even if he did not say anything. She was playing when she asked and I think it was fun.