House customization "stuck"

[Colgarra]

I decided to re-do some of my teleport floor tiles and no idea what I might have done to cause this issue, but now it keeps telling me that I have an "Illegal Floor" and refuses to allow me to use the eraser tool on over half of my walls (all floors affected).

What the heck did I do and how can I fix it? (I waited for 2 hrs for a GM and gave up on that exercise in futility)...

 

[Colgarra]

 

[Colgarra]

**** UPDATE ****

I went back and started all over, and now the roof "issue" with the missing corner is resolved (by itself). The main problem now is with the ground floor. It still refuses to let me put tiles down like in the image above.

 

[DevilsOwn]

I have a plot that won't let me cover the ground floor on the east half just the opposite of yours.... I have to clear the design multiple times to get them to stick, no idea what's causing it

 

[Colgarra]

Since it doesn't help to "wipe" and begin again (since I did that), how do you go about "re-sizing" a property? Thinking that may do it...

 

[DevilsOwn]

before you do that try changing the foundation, which you can always change back - it somehow fixes things sometimes

 

[Colgarra]

Finally got it fixed, DevilsOwn... I deleted the multicache.dat file and took it down to the foundation and all is good now... Thx for the ideas, I appreciate them...