Wrong Y position spawning when restarting the game.

Well today I have a bug, transportation layer as shown in the video, turn to entrary exit the game, such as I'm locked up as I show in the video and to leave and enter aparesco layers or blocks above, I hope to explain well anyway I leave the video in Spanish and I speak very bad English.

Link Youtube: http://youtu.be/BwOc8uG9YRA