Different texture displayed.

No clue. I've seen the texture before from time to time, on random things. Once I even tracked it down to not properly updating Icon variables when the texture atlas reloaded. However, in this case I pull the texture straight from the vanilla stone block.

Textures are weird.

I had a poor ore in my hotbar turn completely blue. Just the one stack. No idea how that happened.

I might have fixed this one, closing.