I thought I'd upgrade my staff finally to an infernal one, so I went to upgrade it. Normal to nightmarish upgraded just fine, but then it won't let me upgrade from nightmarish to hellish.
As you can see, I have the recipes, the nightmarish staff is in my inventory, but the hellish recipe claims I don't have the nightmarish staff under the required materials. I've got plenty of gold as well, and as you can see, that's not the issue (the gold isn't in red.)
Any idea what's causing this? I tried starting new games and moving the staff to my stash and back, nothing seems to help.