So yeah i had over 100 lutefis in my box then i saved and exited, restarted the game today and what's int e box but 4 Steel Ingots in place of all the lutefisk... Awesome.
Have you checked your other crafting boxes? I think there was a beta bug that swapped around the contents of crafting boxes and it still may be around. Chances are your lutefisk is sitting in your ingot cruncher or distillery or something.