Can it be because the paste mask output is created based on pads on layer Top/Bottom instead of pads on Paste mask layers??
If you don't want paste mask on a specific pad, you must not put info on paste mask layer of your decal. Then, you must also set the paste mask expansion to "0" in the CAM setup.
It looks like your suggestion corrects my original issue; the software does what I expect in regard to that one part. Unfortunately unchecking the "pads" box from the bottom layer totally removes many other parts from the paste mask which don't have any paste mask settings. Something lurks...Thank you.