also
if there is a single team bye each round that means 22 (or the new "magic" 23) byes spread over 19 teams.
therefore 3 (or 4) teams have 2 byes, whilst the other 16 (or 15) teams have one bye
they could manipulate it so extra byes for the other teams were created resulting in everyone having 2 byes, but obviously this represents a loss of a large number of games and hence loss of revenue and tv rights games
alternatively they could leave the fixture for all games post round 19 undeclared until round 19, then allocated the second byes to the bottom 3 (or 4) teams
whichever way they go it looks a bit of a mess. knowing the afl it will probably be another example of why the draw is not equally fair, and $ reasons will be triumphant over fairness