The bike fitter(s) should know this, but:
Are you moving the seat forward OR upward?
You need to do both.
for a 72 degree frame, I would recommend moving seat forward 10mm, and upward 1.6mm.
Try this with no other changes.
You seem hypersensitive to positioning, so I am steering you towards being very precise.
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One other thing to try, just for kicks, is to move the seat up (stretch your legs) until your butt starts to hurt or until you can feel yourself rocking back and forth too much, then go back down about 5mm. This means ignoring the bike fitters and listening to your butt, LITERALLY adjusting the bike by the seat of your pants.