Outside doors moving up and down

[nbh707]

I created a house and put doors (inside and around the perimeter). Later I added a 1 meter foundation under the house by creating a 1 meter wall directly under the outer wall of the house.

I have found if I show all levels, the doors that are on level 0 (above the foundation), no longer are shown at 0 elevation. They start 1m above the floor level. This does not affect the interior doors, so I assume it has something to do with the wall I used to create the foundation underneath.

Any idea how I can get all my doors to be in the right place but still keep the 1 m foundation visible?