When adding an item to the CraftSim Craft Queue which includes a Finishing Reagent (Enchants & Equipment) e.g. Forged Framework or Concentration Concentrate, and then select 'Create Auctionator Shopping List', it will add one extra finishing reagent than the number of items I have queued.

In the attached picture, you can see that I've queued 6 crafts of an enchant, but it wants me to buy 7 Forged Frameworks.