Inroads SS4 cross section elevation limits

I am trying to create "sheet" cross sections in SS4.  I have a reference file with 3D pipes that I want to show up in the cross sections.  For some reason I can only create "stacked" sections when this file is referenced, and it gives me a lower elevation of -8600 ft, and an upper elevation of 8590 ft.  I have checked the reference file and I can't find anything near those elevations that it should pick up.  I don't see any way to set high and low elevation limits in the create cross section dialog box (like there is in the "controls" options in the create profile dialog).  Is there a different way to do this?