A good nights sleep solved everything. I had a hidden terrain perimeter I could not see, hence the small rectangle under my foundation where the terrain intersected the building. I opened my plan in 3D and then hit the edit arrow. I was able to pull out the terrain perimeter enough so I could see the edges outside my foundation. I went back to floor plan view and adjusted the rest of my edges. All is solved. You do need to have the box checked to " show terrain intersection" or it may stay hidden forever. Thanks, from a real novice.
LDRobertson's post in Terrain not visible was marked as the answer