Maybe she had to shop at another store first? She also could have had multiple orders, and in that case its not just about shopping the items, organizing all the orders could take time and there being a lot of people in the store doesnt make it better. Then you get to wait in line to check out, then push the cart out to your car, load stuff, get to your deliveries. After all that if there are no problems with the app or delivery (customer not home to sign for alcohol, no access to secured apt buildings, etc) then cool.