You are getting WAY too hung up in very minor details.
Just as a small quibble, note Doc's post earlier ref how a bullet might be heavier than spec when pulled out of the gel.
I'll note that IMHO the bare gel testing is a good engineering test, to see if a bullet completely over expands or fragments, but that's about it. The fact that nearly every JHP bullet I've recovered at a crime scene, or seen pulled from a body, looks just like the bullets taken from the "heavy clothing"/four layer denim testing is a real clue for me which of those tests I pay the most attention to.
My short version is, look at the heavy clothing and the auto glass test, everything else is academic.