Trying to figure out why my stack of small metal sheets don't count for creating a metal container, but it says I have 1/2 small metal sheets I need. Looking through my items, I see one of them (the required one) has a more square shape with rivet marks on the corners. The other is more flat looking. This is also the type created by cutting a sheet of metal with a saw (it's unusable). I can make a metal sheet from 4x small metal sheets of the correct type - but this alternate icon type that stacks doesn't work. Is this a mistake in Hydrocraft's or is this alternate small metal sheet used in another recipe somewhere?