Sounds like something may not be working as intended, thanks for testing and we'll look into it.But if you then raise them, you can go higher. That may let players use alot granit to make a new flor, only to see it deleted. I could not build a stair on top of my large Tower but I could build a stair of floor tiles and then get up in the hight for a new floor.
Sure it was deleted but nothing tells, that I'm not allowed as I can plave the floor tile and then raise it, step on it, place next and raise that one. Think they should show as red if to high