Yeah, apologies about that. In the earlier games the engine I'm reusing didn't have both types of blocks implemented and I redid the multipush blocks when needed, choosing the style of implementation on the spot, leading to variance in which way it behaves. I think the latest ones have been consistent about it, ever since I decided that for me the most intuitive way to think about the system is "non-multipush blocks are heavy, and thus they can only be pushed if they're the first thing you push".