Center Stringer at Landing

[ssr104349943]

I have a curved stair with a center stringer. I can't get the stringer to follow the stair at the landing. For some reason the stringer at the landings goes around the perimeter of the landing. I have no idea why this is happening. My boundaries are all correct, the landing segements are set to flat.

[d.stairmand]

that normally only happens when your open stringer offset does not equal half the stair width
How many stringers are you using? you should be able to make it with 1 stringer