Ok, so I'm really new to hosting a server and stuff, but when I set it up it worked. Whats weird is, after logging off and going to bed, we logged on the next day and the world was totally different. We were fine, thinking it would just be a one time thing. But sadly, we logged on again the next day and it had switched back to the first world! I haven't messed with any of the files except to turn off pvp and stuff. I was wondering how it was happening, and if it's possible to stop it. Thanks in advance guys :D
ulxlx

Oh and btw, this is all with just one world folder that I haven't touched at all.