I have found one half of the solution. It seems that the levels were off and that the upper floor's floor was lower than the ceiling thereby masking the display of the ceiling. Re-aligning the floor elevation, thickness, and height has solved the issue for level ceilings. Keet's guide at https://www.dodecagon.nl/dodecagondocuments has helped a lot here.
I continue to have issues with ceilings at an angle unfortunately. I have two levels which have a continuous slope (the roof starts mid 2nd floor and continues to 3rd). Sloped ceiling works but very inconsistently and currently only at the topmost floor. Hoping for someone to have met this challenge before
