Covered entry with recessed stairs

[brookesdesign 1]

I'm trying to recess my stairs into my front covered porch but I'm getting a small strip of subfloor under the wall where my steps start.  I used a wall with an arched doorway to create the arched entrance where my stairs start.  To create the area for the stairs I drew a room divide and called the space for the stairs as open to below.  Is there a setting I'm missing to help clean this up?

[solver 1682]

10 minutes ago, brookesdesign said:

Is there a setting I'm missing to help clean this up?

 

Probably. Open the doorway and see what you might not need.

 

[brookesdesign 1]

I couldn't find any settings that cleaned it up but I tried dragging the bottom of the doorway below the stoop and that fixed it.   I have to turn the casing off but at least the subfloor is gone.

[GeneDavis 156]

Here's a hint:  "sill"

[ericepv 19]

Turn off the sill.

[brookesdesign 1]

My sill is turned off.  It only goes away if I turn the casing off.

[ericepv 19]

Try selecting the area in question and then check in 'Active Layer Display Options' to see what layer it's in. It would also be helpful if you post your plan.

[SPSEngineering 0]

Try changing the Riser Surface? 

[solver 1682]

Look at the image I posted above, and compare with yours. What's different, other than mine has no sill?