So are you saying that there will be no draw, and B1 will contain rankings 13, 17 and 21, B2 will contain 14, 18 and 22 and so on? If so, it's hugely advantageous to be 21st (B1 - nailed-on play off place) rather than 20th (B4 - much less certain). The Football Rankings site uses "pots" terminology, so I assumed it was a draw.
Thanks for the info, btw!