Definitely something funny going on.
I was in Atlanta this past weekend and I was doing 70-75 unloaded in 95* heat with the AC on and over the 60 miles I drove the fan was on fully engauged over a 1/3 of the time. ECT were around 202 the whole time.
Then today I went to fill up with fuel. Left it idling for the AC after pulling off the highway with the ECT at 198. After pumping fuel in I got in and the ECT was 207 and the AC was almost not cold.
Rather frustrating to have a truck that can't keep itself cool when it's unloaded let alone loaded.