The cookies were on the menu, but they weren’t available at that location.
You had to go to the store down the block. Of course, the only way to know that would be if you had been there before and wasted one trip already.
Of course, the store owner could have changed the sign, but, that might cost him or her some time & money.
Seems obvious, but, the thing is, signs aren’t always in print. They also exist on the faces of your cashier, and in the voices of your customer service team.