So, I have never noticed this issue until now. I am using a railing type to model my stair stringers, because the railing tool does a better job keeping it continuous. However, I noticed that the railing tool seems to sweep the profile with it always in a vertical orientation rather than keeping the profile perpendicular to the path. The issue is that I thought I had a consistent stringer depth, but as a result of the way it sweeps the profile, my stringer is 368mm deep on the slope and 407mm deep on the flat. Is there a way to get revit to treat the profile differently?