Since the NISM manual states the limit is 71 deg for the PM measurement, what do you do when the limit is exceeded during measurement?

Do you disregard that I have a couple PMs between 72 deg to 75 deg when I use a load less than 0.5A or greater than 1.5A on the VRM. So for a 1A load, I see ~66 deg PM.

Also, is there a method you use to calculate the gain margin with the NISM software setup? If not, how do you calculate this or do you when you are using the NISM software on the (respective) VNA?