League position, isn't it? This round sees the PL teams who aren't in Europe enter, who I presume are all seeded, along with the clubs who finished highest in the Championship last season.
I was wondering about this but I've worked out (I think!) that it's because it's a seeded draw. Therefore Salako draws the seeded team, and then decides if they're home or away via another ball. Then McLeish draws the unseeded team.
Carlisle v Sunderland looks vaguely likely to draw interest up...