Many of the august 1st week applicants have not yet received AORs, it is more than 2 and half months for them. Going by that,
september 1st week applicants should expect their AORs mid-november or later.
I see one August 13 has just received his AOR . Maybe they don't respect ORDER at all.
I really want to know their method.
The thing is you can't rely on the information posted on this forum, or spreadsheet. Applicants might've already received their AOR, but haven't reported it here. Or, haven't checked their email. There's a multitude of reasons for this to look like there's no order in the processing. And yes, there will be exceptions, there's going to be applicants waiting longer than usual for the AOR (and processing in general), and there will be applicants with less of a wait.
For example. August 2018 spreadsheet:
Line 07. User "ash73". Should've received the AOR around Oct 15/16. If you check this users profile it says "Last Activity: Oct 14, 2018". So for all we know, the user received the AOR, but hasn't checked in.