In my case I coudln't include my complete travel history in the fields provided, so they asked me for additional documents on Sept 6th, which I uploaded on Sept 8th. Not sure if that will increase my waiting time.I am in the same boat as you.. AOR aug 24, Medicals passed, we are processing your background check then changed to NA but I haven't received the payment request so I assume I am Ip1 still. I see that everyone getting PR have docs Satus changed to no additional documents .. that's a good sign that things are in last check phase
I am IP2 since yesterday, I guess we'll have to wait and see.