Roof causing interior wall problems

[FooBear]

I'm trying to get from the roof on the left to the roof on the right. 

Clearly, I was able to do it, but it's causing me problems elsewhere (more on that later.) This is an attempted as-built  drawing of an existing condo unit.

 

Here's how I did it, pictorially.

 

 

(And yes, that is how the stair landing area is framed.  A teeny tiny unused space behind the 2 foot deep, partial-height closet on the landing.) This was with auto-rebuild roofs on. And yes you may see some weirdness in the plan.  I've been trying to build it with an eye to capturing the interior dimensions as accurately as possible.  For instance, if you do it my way with my dimensions, the ridge looks a little funny.  If I use a different value for the baseline of the 12 in 12 roof, I can get it to line up perfectly at the ridge, but I'd prefer to have the more accurate ceiling heights inside.

So here's the problem.  When I add my steep 12 in 12 roof using the method above, it messes up the walls I have underneath the stairs to the loft.  Like so:

 

It doesn't matter if the stairs and walls are there before the 12 in 12 roof, or the roof goes on first, and then I try adding the stairs and the walls - I get the same results.  There was an error message once, something about the room having a negative ceiling height, but it never came back and I didn't tell it not to appear anymore, so I don't know why it hasn't popped up again.

 

I did try doing this by turning off auto roofs, deleting all the roof planes and adding them in manually, but there were too many problems I couldn't figure out how to fix.  Floating walls and framing above the roof. The siding on the one gable wall not automatically turning into interior-4 under the roof line, etc.

 

I've included a copy of the plan prior to putting in the 12 in 12 section of roof.

 

Any help appreciated.

Drawing for forums.plan

[FooBear]

My bad.  Version is in my signature now (HD Pro 2020)

Also attached is a the plan with the 12 in 12 roof and mutated interior walls underneath the closet.

Showing problem for forum.plan

[solver]

Try Edit>Reset to Defaults

 

 

 

You will need to rework some of the 1st/2nd floor stairs.

[FooBear]

Forgot to thank you for the help.  Thanks for the help.

I was able to restore the entry & middle landing platforms after resetting to defaults, but there were other issues I was unable to overcome.  I had to move on. So when I need any 3D screenshots of that interior hallway/stairway, I'll just delete my 12 in 12 roof section temporarily. Thanks again.