Bukkit

The enhancement/ me likely not knowing what I'm doing...

There should be a way to state the name of the player
EX: Welcome to the server MYSTIC_SPIRIT12!
or...
Welcome to the server Mr. Potato!

The Problems...

For my problem, whenever I restart the server, the config. resets or something.
EX: In the game/server list it would show the pre-loaded MOTD and only that.
While in the FTP it would show all of the MOTD's I came up with. I've retyped all of them around five times
so far for restarting to fix any bugs.
If I'm just being a complete moron and not finding my flaw please help me at least, Thanks!