No, don't worry that these dates don't match. What's important is what time you placed your order, before or after 5:30 PM EST?
I got Premier confirmation emails at 2:36 pm and 2:49 pm CDT on 10/7. However, I didn't have a chance to call them and fix THEIR credit card snafu until Monday morning (beginning at 6:57 am CDT, and putting it lightly, crap hit the fan). It was my understanding that when I finally got through with them at 9 pm CDT everything was squared away and corrected.
Except for my superfluous orders that I canNOT cancel and simply have to refuse shipment on or return to an authorized retailer. So stupid.