When creating a new Bottomless Pit world, the settings reset into Classic Flat. Of course, Bottomless Pit should be an empty world except for a cobblestone platform.
When creating a new Bottomless Pit world, the settings reset into Classic Flat. Of course, Bottomless Pit should be an empty world except for a cobblestone platform.
I think you're confusing the "Bottomless Pit" superflat preset with "The Void". If you want the empty world with the cobblestone platform, choose the "The Void" preset. (iirc the "Bottomless Pit" preset simply removes the bedrock at the bottom of the world)