I do believe that the second and third placers still wrestle the scheduled district but on the opposite side of the first and fourth placer. I am not totally sure but something like this.
D1- first D4 -fourth
D2 third D3 second
D3 third D2 second
D4 first D1 fourth and the opposite on the other side.
I am not 100% sure but this would assure that the district placers are divided evenly!