version #19800 (My Little Blacksmith Shop Win 64 Alpha 0.0.71)
In addition to single ingot crafts changing materials to the last-used material (which is well-reported on by now), when you have "blunt" selected (and because there are no single-ingot blunts), the anvil creates the last-used shape, eg. you can make a single copper ingot into an iron greatsword by crafting an iron greatsword normally first, then switching to blunt and crafting a single copper ingot.