Stability problems please help!

Seems no matter how hard I try…I end up with a stability problem in my base. I always honey comb my bases and right now I have one going and im only on level 3 and already some ceilings will only place for 77, 63, 50% stability. I even removed a bunch of stuff just to confirm I had all pillars placed. I do. and for some reason a pillar is only placing for 66% stability on level 2. and its ruining my whole base for no good reason. Everything else is 99-100% and I can’t seem to find any reason why this problem is happening.