Just an observation... its not really necessary to 'quote' the entire post with all the pics just to reply to it, is it?
Otherwise... +1 on lube. That looks like galling more than anything. Assuming that pilot on the neck turner isn't too rough, the inside of the neck should *NOT* come out looking like that! The K&M turner I use has polished/hardened pilots and mandrels, but they still get some brass buildup over time and I need to a) remove that stuff before it starts increasing the diameter of the mandrel or the pilot, thereby screwing up my neck thicknesses, and b) make sure it doesn't start causing undue friction/heating which can again mess up the resulting neck thicknesses. More lube is the first step, and keeping the turner and its pilot clean and cool is the next.