I used same logic as yours but slightly different assumption in score distribution, and my calculations are as following:
July 24 after draw:
[451-600] = [451-459] = 3990;
Aug 12 before draw:
[451-600] = 9657.
Meaning, from July 24 - Aug 12, new adding [451-600] = 9657 - 3990 = 5667,
among...