Why I got annoyed and how I got free groceries

See this?

You see one package, right?

And you see the price which is $2.59 and then a 50% discount, right?

Why, why, why, when I got home did my receipt say I had two of them at full price?

I immediately turned around and drove the mile back to the grocery store and had a chat with customer service. I (politely) told the CSR that most stores give you the item for free when the store makes a pricing error. She looked a little comtemplative, then said, "Okay."

So minus one for me: I had to drive back to the store. And plus one for me: I got free groceries.