I guess that's what happens when you skip months of updates.
I am being weary moving forward as Google said they will be blocking sideloading (which will be a lawsuit).
Edit: Not available yet for me on T
Edit 2: I think you're referring to a System update. I was thinking Google Play System Update that's still on #$%@ July.
I'm intrigued and maybe a bit confused. (Does not take a lot these days). On EE network in the UK, I got the August update on the 19th of the same month at12.57 hours. It was a mere 574.08 MB. I really am unable to see much difference.