CharlesVolz

Try holding down the Ctrl key and dragging or using the Transform/Replicate tool.

This way may be easier to measure the existing stairs close enough in the field. I am still assuming that the stairs curve along a single arc as shown. It is using the Intersecting Chords Theorem which says that the product of the lengths of the segments of any two intersecting chords is equal. When you use perpendicular chords you can measure A, B & C close enough and calculate D and thus the radius of the existing stairs.
 

Yes, just add a second floor.
Timber frame1259140725_Brook CV1.zip
 
Sometimes I will add additional floors to control the bottom of the clerestory walls separately from the first floor. So, the clerestory walls will be on the 3rd floor. The 2nd floor would be used for any loft or attic storage above the first floor. Like this:
 

Use one door the width of those two. 

Your wall layers are not set up correctly.

 

 
 

Extend the railing wall a couple of inches. Make sure you are on Floor 2 and have the correct wall.

 
Now someone make the drywall wrap properly...

Howdy Chris,
 
It just seem like a roof problem. Just align the roof baseline with the outside main layer of that porch eaves wall and see if that works for you.
 
Proper baseline location from my change:
 

 
Before baseline was moved:
 

 
 
After baseline was moved:
 

 
For others: The baselines need to be at the correct elevation also, which they were.
 
I did not change any roof defaults, like sub-fascia size.
85332670_BeamMisalignment CV1.zip

You have to be in a section/elevation camera, not full overview.

Select basement and check "flat ceiling over this room":
 

 
 
 
 

That is your sub-floor from Floor 1 above.

1463105307_ShedRoof CV1.plan