oops sorry for the blunder Blackkiwi

In thinking about these draws I just order them and look to see where there is the biggest gap in 2 neighbouring team's Qs after ranking them. The gap between all teams in your league are close but under 1 except between 6 and 7 (yours) which is 1.8 or more than double the others.

I'd suggest that this league of 2 halves is only part of the answer if at all. (It did seem to be an existing mechanic anyway as, often, at lower levels when I started, level 2 leagues were created by 7 teams from 1 league and 7 from another....so thats why I took a stab at it (and it seemed to fit for me))