Chad,
I think I know why the Calman autocal is working so poorly for you. You cannot leave Contrast at default. Sure there is no white crush or color shift present with the HiLo Track plus it may already be bright enough. Never-the-less, make sure you increase contrast. Once I put contrast at +7, rechecked my brightness and THEN autocalled, the gamma and GS results were INSANELY perfect. The first time (before I increased Contrast), I autocalled and all looked great on the graph until I checked with a staircase pattern and saw the train wreck…like you said, the autocal fixes one IRE and trashes it’s neighbors and tells you all is fine so you have to double check for it…but I am telling you the key is to set that white level higher and all will finally work as it should.