Loading a file and it's resetting to a new world on each file on all areas such as survival, creative, super flat etc...

So I've been playing new worlds that I've created on my PS3 edition and I have had no bugs before in the past. Whenever I load a file after turning off my PS3 it resets to a completely different world. This is the same reset world each time and it's bugging me because I have spent a lot of time making files that I have to go on my X-Box to play minecraft now. The world is completely gone as well as all the progress. My PS3 edition has completely bugged out and has crashed a couple of times because of it. I have saved the files before turning my PS3 off so I'm confused as to why it's resetting. Before it only used to be on super flat worlds, now it's on every type of world.