A bit confused here. I know before the recent updates you were able to make duplicate spellgems of spells you already had in your inventory... but that seems to be removed. For example, I've got Fireball L3 already, but without any modifiers. I got an Uncommon orb from a stash room and would like to craft a new Fireball spellgem with the uncommon orb. The workbench won't let me, though - its only options are the spells I have yet to obtain for this level.