I feel your frustration McCloud, I've done the same thing more than once. If I recall the crafting table is partially to blame. After upgrading once, I went to upgrade to level 3, grabbed the materials from our treasury and the table opened with the Iron Chest piece highlighted by default, not the upgrade menu. The default should have opened the table on the last thing I did, NOT the last thing I made. I have noticed when cooking, most times it will open and highlight the last item cooked. That feature should be more universal, always taking one back to the last thing you did at the crafting table. I was pretty choked when it happened with the Iron Chest piece, because we had the exact amount of materials necessary to make 2 fully upgraded iron breastplates. Considering how much time and effort was required to get the iron, my frustration was palpable. It would be preferable for it open at the top of the list of craftable items, than for it to open and highlight the last thing one made.

An easy solution Kalfax, would be for crafting tables to place the last thing one made at the top of the list, the item made before that beneath it etc.