You can correct this, by changing the league name at the beginning of the league.dat file. The trick is you need to do this with a
Hex Editor (not a Text Editor). When you enter the new name, be sure not to insert any new bytes in the file - just type over the existing bytes. If you want to make your league name a little longer, type over the 00's that trail your current name.
Make a backup copy of your league files before trying this.
Here's where you can find one of those editors...
http://download.com.com/sort/3120-20...editor&ca=2001