Used a fine transmutation stone on my Twilight arbor boots so I could use the look of it with the stats and the rune of the Sorrow’s embrace boots. When I was using it, it said that the boots were the same but they were not. So I re-use the stone to see if it was a mistake on my end but it was not. So I decide to keep the rune on the twilight arbor boots because apparently keeping the rune of the nightmare in it classifies it as a different set of boots. I used a rune of the forge on the newly transmuted boots to fix the problem and then it turned them into the Sorrows embrace boots. Looks like I have to run Twilight arbor again