That's... something.
I'm about to head to bed after this backshift is done in like 10 minutes, but I'll take a look when I wake up. Quick question, your screenshot shows you have a shield in the first slot already, if you take that shield out, are those other armor types selectable?
I'm thinking the problem has something to do with how I handled independent items in the item selection window. Namely, the way it disallowed independent items that were already in the ingredient list above. I think it maybe doesn't work correctly with equipment, but like I said, I'll give it a check when I wake up later.
-Ramza