I'm not exactly sure of what I'm supposed to be seeing here.

There isn't very much of the data that correlates, due to using different bullets in the two sets. In one, they used a 158 gr Lead bullet at 7.7 gr and 35,800 cup (which is only 10,000 cup less than max), a 158 gr Rem SJHP at 7.5 gr and then omit the lead bullet and switch to a 158 gr XTP at 6.5 gr (that's 5,400 psi, 16+% less than max).