I take it that is the limit in your profile? I wasn't being serious if you couldn't tell.
To be serious for a moment, isn't the favorite system better than a sort by author? What would the sort default be? Alphabetic doesn't really seem like it would really help.
It would be more helpful IMO to have a link on map pages (for example: http://warlight.net/Map?ID=2881
) that says "See more maps by this author" or something like that. Or in the drop down where it says "Featured Maps", "All Maps", "Your Maps", etc...that it had a "Favorite Authors" drop down as well. Then you could see all maps by your favorite people, and then you could apply the sort after (territory amount, rating, etc).