Originally Posted by RM-MN
If you look closely at the top right corner of the instruction sheet you will notice that there were 2 ounces of hops with the kit, a 1 oz package for bittering and a 1 oz package for aroma and if you look real closely you would notice that they use the same variety of hop for both so you simply can't use them in the wrong order. Here's a link to the instructions in case you misplaced yours.
They have instructions for all their kits online here.
My brother in law did a Brewer's Best kit that was similar, but the same varietal doesn't necessarily mean they're the same. It was an IPA, with Columbus and Cascade for bittering and Cascade for aroma. The two Cascade packs were the same size, and varietal. But the AA ratings were different (the bittering Cascade were slightly higher).
So they might not have been identical, but couldn't have been that far off. In either case, the differences for the OP's beer should be minimal at the most. And without a side by side tasting, might not ever be able to notice.
Next: Milk Stout, English Nut Brown
Primary: House ESB, House Best Bitter
Souring: '14 Brett C Old Ale, '15 Lambic, '14 Lambic, '14 Flemish Red, '15 Flemish Pale, '15 Oud Bruin, '15 Session Kriek
Bottled: Kitchen Sink Tripel-ish-thing
Cellar: '10 Brett B Tripel, '11 Lambic, '13 Brett C English Barleywine, '13 Quadrupel, '13 Sour Stout, '14 Brett C Bitter, '14 Spontaneously Fermented Cider, '15 Wee Heavy, '15 100% Brett B Red, '15 100% Brett L Kriek, '15 Bière de Garde