It does? Qwerty, do you mean the winner of the first mini knockout plays the loser of 2nd v 3rd, with the winner of 2nd v 3rd going straight to Wembley?
Probs easiest just to look at how it worked last year https://en.wikipedia.org/wiki/2017–18_National_League#Play-offs
That sounds like 3rd get penalised by finishing higher than 4th-7th.. Edit: just seen Qwerty link.... I get it now.