They never pay by their terms. According to their terms payment for August shops should be the beginning of October. They use the phrase "payments are processed" so they can go back and say they are still being processed. When I first started "processing" took 10 days, which was laughable but not that bad. 5 years later that has been extended to "processing" taking closer to 20 days.
There are reasons that a body stays in motion
At the moment only demons come to mind
Whenever I do shops for SR, my checks come between the 15th & 20th of the month AFTER the month I do the shops. So your August shops should be paid sometime this month, probably between the 15th and 20th. They will pay, don't worry. They just take awhile, and you have to know that going in.