Complex Mass Model Misbehaving When Attempting to Create Walls

Hi, I'm trying to create a structure for a school project and I'm having issues with the walls not following the contours of the model. I've tried to do a lot with this and I can't seem to get it to work. The wall profiles can't be edited because they're curved on multiple planes and extracted from the model. The model itself was created in AutoCAD 3D and exported to a Revit Mass family so that I could use it. Most of the other walls with very complex contours don't have this issue and follow the model perfectly. I've attached example screenshots, I have no idea how to fix this.

You might try using an in-place void assigned to the wall category to slice off the extra wall. A void revolve could spin and cut away the interior and exterior or two could, one for interior and the other for exterior. The issue you're running into may have something to with end at a point at the top, not sure though. You could also try building the mass shapes directly in Revit and see if the wall by face is more tolerant of it that way. If those walls will ultimately be glazing (curtain wall) you might try using curtain system or divided Surfaces. Good luck!

As awesome as all of those options sound, I have no idea how to do any of that. Do you know of any good resources you could direct me to where I could learn more about those?

You could start with this SEARCH result. In-Place family/mass modelling is a bit esoteric but then your building form isn't routine.