Baby Derrick AKA The Accomplice

My daughter came today to take me out to eat and to see My Grandson Derrick.
We went to Pizza Hut and had a great dinner and afterwards went to a Baby store to pick up a new car seat.
She found one she wanted and there was none left on the shelf for the customers but a box up on the top shelf ,so she got someone to get the box downand off to the cashier.
While everyone in line was playing cuchee coo wih the baby I took everything out of the box , there was 2 items in the box , so I figured it was the car seat and the car seat carrier .
She pays for the car seat and off we go.
As I was putting everything in the car my daughter notices that there is 2 car seats that I was stuffing in the trunk, I looked and I'll be damned, there was 2 car seats in the box, then it dawns on me that's how they ship them to the store , 2 per box so there is no wasted room or odd shaped boxes sothe truck gets full and no space is wasted.
Now my daughter asks me if we should return one, the right thing would have been yes on rerturning it but I want your opinion on this?
1 return one
2 keep both, one for each car.
3 donate one.
4 sale one on E-Bay
5 return one for store credit.

It's all up to you.
Please put your opinion in on this matter.

And remember....
Laissez les bon temps rouler!
And as always, thanks for listening!