[Dave Bilyk]

Fred, I think that roaldin has touched on a likely issue here. From the strange pad wear, and the picture of your disc, it is possible that you have to much flexibility somewhere in the caliper mounting. This could be in any adaptor component used to mate the caliper to the upright, or in the caliper mounting on the upright itself.
From what I understand, too much flexibility in this area has two effects, first, deflection and twisting of the caliper relaative to the disc under steady braking loads, which causes the biased pad wear, and second, brake judder which causes the hotspots on the disc.
I would look carefully at the caliper mounting for any flexibility due to insufficient robustness, or poor mounting due to any additional spacing washers used to position the caliper.
I have seen some brake upgrade kits which look very suspect in this area.
So, did you notice any judder while braking hard? because those heat markings certainly suggest it.
What is the pattern on the inside face of your disc?
Does the caliper use a mounting adapter and any spacing washers?
regards
Dave