1st issue fixed: the windows’ 2D graphics were showing up, and also for any doors, but the wall openings appeared as a solid wall in 2D. I misunderstood the section planes. Once I investigated the scene further and put the right ones in the right place it corrected everything.
2nd Issue: I tried removing the surface for the column’s 2D graphic. I think it needs to be in there to show above the brick veneer on the edge of the porch, so I put it back in there. I have the brick in an exterior-wall-tagged group. I just need to figure out how to get the columns to appear above it. In the configurator I tried changing columns to be in the higher-stacked Light viewport as you mentioned, but still getting the effect in the attached image.
Thanks for your help!