Weird hitbox on 2 x 2 x 1 block

So essentially I'm trying to make a hanging bench since I figured once I learned to do the things for this I could apply it to other chair like or hanging objects. I've got the "hanging" part down I believe as it now checks if the block above is solid. The issue is my test block was just a cube so I didn't realize it would do this when placed as the full model. It thinks it's still one block which I hadn't really thought about initially. If there's a way to make it actually take up the right amount of space I would like some help with that. (preferably without splitting the model as this would split weird as is).

Also help with the seat part would be nice, but from what I can see there's a few of those? I haven't looked into that part much considering this part is being weird and I have to leave soon so I'll check more when I get back home later. I did check for this but most are just "bounding boxes do that" with no further info, plants, or this one that split it but theirs was only two tall not two wide. Oh also: said bounding boxes are showing correctly but only when I look at that 1 by 1 area. I think that's everything, and that's a temporary texture btw.