New map glitch

Here is my ... Hyper Glitch!
I play minecraft, and I create a map for make minecraft system. "Command Block & co". When I found myself on the game, I forgot to do a "flat" game. So I delete the old map to recreate another. I begin, I renamed it the same, and boom! I come back on the same card as the first. I move a little and all is flat! You can see from the picture I put this strange bug.
Thank you.