For as long as I've been using Revit, since version 2011, CEILINGS that are sloped have never worked properly in their association to a level. In every project, in every version of Revit I've used, this has happened. - (I do wood framed residential work, and every project has sloped roofs and sloped ceilings. I set up my projects to have levels for plate heights, so roofs and ceilings are set to the plate height level, not to the floor level with an offset for the roof plate height). - Flat ceiling seem to work OK. When a ceiling is sloped, it will stay associated to the level of the view that it was created in. When the level is changed, the ceiling does not move. The sloped ceiling can be moved vertically up or down, and the height offset will change, but if the level is changed to be different than that view it was created in, it will not move. Then, as if by some mysterious Revit magic, at some point if the ceiling is modified in some unbeknownst manner, the ceiling will report to the height offset of the level that it is associated with, not the level view is was created in. This results in ceilings being moved from their final resting place, and often associated warnings, and then we're into the realm of the warnings problems. This is very problematic. It's another Revit glitch that needs be resolved.
