Redstone Dust and Mineral Ores are both classified differently between Furnace and Blast Furnace.

1. Redstone Dust

In the Blast Furnace, Redstone Dust is classified as an independent category with the icon of "Redstone Ore".

However, in the Furnace, this is classified in a category with the icon of "Stone".

I'm not sure which one was absolutely right.

2. Mineral Ores

Besides Redstone Ores, all of mineral ores in Furnace and Blast Furnace are also classified completely different.