Thank you for reminding me that wall direction does matter and it does affect behavior. I experimented extensively with walls going every which direction, and I found the best rendering outcome when I draw the walls for a room in a consistent (say, counterclockwise) direction. Auxiliary walls (like for a closet) had the best rendering outcome when I turned Autocleanup off and drew the wall close to, but not quite touching the adjoining wall. I then snugged the auxiliary wall to the adjoining wall and found the auxiliary wall did not jump to the opposite side of the adjoining wall, thus eliminating the strange miter.
Perhaps I should learn to live with the strange wall tool behavior, and not be too particular on how the wall joins look. That would make TurboCAD life a bit easier
Thank you again for your response.
PS: HA!! You are very astute! W359 is the name of the company I work with. The founder got the name from an old Outer Limits episode, and the star featured prominently with 1701.