Rosco2017 and Charles Volz,
Your recommendation about the railing wall did the trick...easy once you know what to change!
CharlesVolz,
The railing suggestion worked. I thought I had tried this several times.
Solver,
Your observation about top and bottom wall heights is correct. I'm going to save a copy, read up on the settings you mention, and Reset To Defaults as you suggest.
Thank you all for your input!