I don't know why it does that, cause all it's doing is changing the team name. It shouldn't interfere with anything else. I never play WL though, so I never noticed it. It might be a corrupt download, as I've uploaded the XML directly instead of putting it in a zip file.
since it is only using the default players you will need to change the default teams. dont know if dharfs editor changes the team rosters if not i might have to incorporate mine into doing it (if i can)