Modpack version
1.81a

Issue
duplication when transforming 1 ingot of copper in 2 copper rod, if I melt the copper rod that give me 6 nugets ( 1 ingot = 12 nugets ) and that also do it to the titanium and the iridium

Thanks for the report, we'll look into it :)

This happens because you probably accidentally removed few excess lines.
Fixed in #1773