Stairs in Archicad is not that straight forward in my opinion. The first thing you need to get are the correct measurements of your point cloud stairs, I notice at the first image is that your treads are extended beyond your risers. Key in first the correct measurements before you draw the stairs. Take note it is also important where you place the reference line (BLUE) of your stairs (internal or external)
In the end what is your Objective?
ArchiCAD 9 onwards