I was trying to upgrade the Tier one cobblestone generator to the Tier two (iron) and it would not craft. I tried in the vanilla crafting table as well as the Tinker's crafting station. I also made a new Tier one just in case it needed a fresh one. Still did not craft in either crafting table. Please fix.

If you look carefully you'll notice that some of the cobblestone generators are created in the chemical combiner because the recipes use more than 1 count of an item in a single slot which is impossible to do in a crafting table.