As someone last round that had a few teams barely miss the top 20 I can tell the above was untrue. Teams that finished behind me had top picks while my teams had 4th and 5th picks. It was straight #21 for league 1, #22 for league 2, etc., without any consideration to how many, if any, of the top 20 had already selected those leagues.
Now, that sounds like bitter grapes and it’s not - I just wanted to answer emanes’ question, at least how it was done last time.
My teams sucked and that had nothing to do with draft order, just poor team building by the owner.