jmk:
Wall display on multiple stories is different than Objects. You need to use the Wall Settings > Floor Plan and Section > Show on Stories >
All Relevant Stories, then use the
Floor Plan Cut Plane (which is a View setting) to control the display of the Wall. You will want to read about the Floor Plan Cut Plane settings to get a handle on this.
You should add a Signature to your Profile (click the Profile button near the top of this page) with your ArchiCAD version and operating system (see mine for an example) for more accurate help in this forum.
David