The recipe calls for one ore.
If you put in two ores, the script thinks you want to make two ingots.
If you fail your roll, you lose both ingots.
Advise making one at a time.
And seems like it is a bug then that owls and fawns have skinable option.
In order to not have to edit every single animal in the palette (and make skins for each different variety) I made ALL animals have the skinnable property but some of them just dont and wont have skins. Owl skin? no - you get a feather. Fawns I guess COULD drop deer skins but technically they would be too small to use with deer leather recipes.