I ordered 4 different phones for different lines on our plan. 1 of those was 128gb 6+ Silver. That phone listed as 10/13-10/22 as well. Order was finalized by 3:45 am (EST)... and was the last of the 4 orders I placed (thats the timestamp on the PDF I made of the order confirmation page)
I think this is the 'second bucket' of 6+ deliveries, with those who ordered between 2:45 - 3:15 EST getting shipment dates of 10/2-10/13 and then our bucket of 10/13-10/22.
Well I got my order in at AT&T at 2:10 AM central time (12:10 AM Pacific) and my order came back at the 10/31 to 11/11 date. Then Sunday it updated to the 10/13-10/22 date. So not all the earlier orders go the 10/2 dates...Mine is a plus also.