I found a glitch where if 2 items have recipes that over lap like the Bloomery base and Chimney, and you place the ingredients needed for both stacked on top of eachother then you can craft 2 copies of the larger item. For example if you try and craft a bloomery base and chimney and spam click it gives you 2 bloomery bases instead of a chimney and base. Someone else can look deeper into this i don't care to search any further.