"Why would the company perform the test without questioning the experience of the person submitting the loads?"
I've had loads tested and I have no special "experience" to "qualify" me to send loads in for testing. They were tested for me and, as I expected, most of them came back well within my self-imposed limits for my 144 and 116+ year old damascus guns. I won't use it in my old guns but the one that was above my limits (as I expected it would be) was still well within SAAMI limits. The recipe was requested by the tester but pressure guns are designed to withstand much more pressure than sporting arms so the testers are not particularly concerned about damaging their equipment.
The problem here is not the company doing the testing but the idiot who thinks that shooting loads with pressures higher than the SAAMI limits is OK. He was properly warned that his loads exceeded SAAMI limits. You can't fix stupid.