Nauticalue

I saw another post by someone claiming what seemed to be the same issue from 2 years ago, but they didn't provide evidence of the issue. So here is where I'll put my own. I cannot figure out why this is happening at all, or if it should be happening to start with. I sure seems the building system doesn't work how it's intended to. Link to video of what I'm talking about If you look, every single piece is considered to be supporting every other. No matter where I place them, the issue remains. I don't know if I'm missing something, I tried finding videos explaing the support system, but to no avail.