Solid cam damage diagnosis help

Cam wear is consistently leaning towards the back end of the cam. I though that was weird too. Is that the result of the rear cam plug being too shallow? Not even sure if it makes contact with the about of the cam. The cam is a Hughes grind and yes they’re EDM lifters. What would be the correction then? Btw I did verify lifters would spin freely in their respective bores. They did require polishing to get them to spin freely during assembly