In the settings for your wall's complex profile try moving the "Opening Reference" line so it does not include the upstand at the base of the wall.
i.e. you want them to include just the main wall thickness.
You may need to activate and show them if you can't see them.
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11