One day I went on my Hamachi server and it's the wrong map terrain & the spawn point had changed. Minecraft Server.exe keeps saying:
[WARNING] Can't keep up! Did the system time change, or is the server overloaded?
I haven't exceeded 600 blocks, and I have enough RAM for 20 players on at a time (1GB RAM). Only 2 people have played on at a time, and 3 total players have played on the original world. What happened, and how do I get the map the way it used to be?