Wall/Butting/Jumping advice

[lgswe]

I have a "Railing Wall" set at 42" high that using to set a bar height countertop on that butts into a full height 6" wall. Also an invisible wall running into the 6" wall that is used to make an "open below" for the stairs that is shown in the attachment. My problem is that I need the 6" wall to go bar countertop that I have drawn on the railing wall about 4" beyond the end of the 6" wall. The 6" wall keeps snapping back to the invisible wall. I tried drawing a short second 6" wall to the line, but the length is to short. I thought that maybe I could use the "hole in the floor platform" polyline. I could make my walls right doing that but a whole lot of other problems developed, such as not being able to see the stairs below in plan view, base molding in open area on walls, framing showing--I'll stop at that. As always, I'm very open to suggestions and ALWAYS appreciative. Thank you.