It is normal to see non-flatland on flatland? Like in the picture? Because I was going to make my own map on flat land but this happened! I spawned in water on top of the non - flat land but then i'm like, "I'm sure I put it to flat land" so I start looking around and next thing I know, I see a cave full of mobs and I'm like yea ok... i countinue... and there it is... the flat land... is it normal to see that?!