You can usually exchange boxes anywhere as long as their not open. So whatever you don't use you can switch out

Babies grow out of their diapers super fast. It's just the newborn diapers have a cut out on the front for the umbilical cord, as well as a line that will change color to see if they peed so you won't have to wake them.
From my personal experience, my first one was almost 8lbs and I went through a box and a half of newborn diapers before I went to size 1. And shortly after she had size 2. Maybe you can exchange a box of 1's for newborn?

I bought all size 1 bc the newborn said up to 10 lbs and the size one said 8-14 lbs so I'm pretty sure she will be close to 8 when she's born I will get 2 when she needs them

Sounds about right @lilmonma33

I have 1pk newborns, 3 pks of size 1, and 1 size 2

Depends on the size of the diapers. You can never have enough wipes tho.