None of Chief's stair settings allow me to automatically display stairs and railing in the manner that we build locally. Any railings that I need to display in 3D are built manually so that I know the same model can be used to produce a dimensioned detail. It's no help to you CEC123, but that method has saved me many headaches, as well as giving me better layer control. I can assign different elements to different layers for different purposes. One difficulty I find is no control of stringer thickness (that I'm aware of).
Also, in my region, the railing assembly would be built on top of a sloped wall that would be framed to match a closed stair stringer. Chief doesn't do that.