Glad to be of help, and I suppose you're right about normal smelting not making sense.
After all the furnace would be too busy with smelting Steel most of the time anyway.

Keep up the good work!

Thanks for updating the mod! Although after updating to version 0.1.3, I immediately ran into a problem.

It now does indeed smelts Copper Ore and Stone as a normal furnace would, but along with that it no longer smelts Iron Ore into Steel Plates and instead smelts it into Iron Plates.
This ...