I was playing with my friend yesterday in 1.8-pre3, while he is not playing today, I would like to continue today with the brand-new release 1.8. Since I'm using a laptop for the game, turning on a server would make my computer really hot, so I intended to move the save file from the server folder to my minecraft folder and play it in single-player mode, but then everything is lost and I was spawn in the original spawn point which is where the game starts.