Solving seccond one is simple: set them all to same setting 😀.
For the first one there are two solutions:
- set these walls Flor plan display to "Symbolic cut". You need to set first: Show on Stories to "Home storey only". The down side of this solution is that you will always see the hatch, even in views where you need to see this wall from above.
- change Floor plan Cut Plane Height so it will cut through the smaller walls. You can do it for each View separately. But be carefull, it will lower cut plane for all elements on that floor for that View.