Whole base supported by everything

[WyldBorn]

Every single piece of my base (even the roof pieces) are supporting every other piece. 
My base has 4 ‘stilts’ holding it up- each is a scaffold touching the ground, surrounded by stem walls.

If I recycle any single piece (even the roof pieces at the every top), the whole base collapses. 

I’ve tried reloading a save, and restarting the game.

EDIT: I’ve just replaced one of my stem walls with a pine wall, and the whole thing is fixed. Although, now it says everything is supporting 0 pieces, which also isn’t correct.