I have mine set to auto save every 5 turns and to save 5, and it shows my new game's 5 then my last games 5. I think the default is save every 10 turns and to keep 10. Is there a scroll? Your positive it's not your game? Go to you auto saves folder in my documents and delete all your saves, load your game, and after x amount of turns see what happens. If the saves are there, and from your game, quit and start a new game. Play until x turns for a new auto save, see if it's the right game, and see if it saves your last games also.