Koz loads up with his feet on the ground, but when you completely zero the figure his feet end up a little below the ground. I found this out working on a face morph for him. I solved that problem by using the "super zero figure"  in PhilC's OBJ2CR2 utility before exporting the head for remodelling. I think this is related to your problem with the development rig. I haven't yet got round to making any clothes yet, still working on the dark texture.

Poser 11 Pro, Windows 10

Auxiliary Apps: Blender 2.79, Vue Complete 2016, Genetica 4 Pro, Gliftex 11 Pro, CorelDraw Suite X6, Comic Life 2, Project Dogwaffle Howler 8, Stitch Witch