It could be related to the hones themselves @ their respective grit levels.
I have a 3k chosera, that when used with slurry will work very fast on most razors, but will also chip the edged on some razors which to me means that depending on the steel you might have to use stones from different lines. When you go up in the progression with superstones, they become easier to gouge, may be due to that and the steel properties you are damaging the edge?
If possible try other set of stones and see what happens.