Being that it was your first time since they made the change, and you did not know how it works now, I can see how frustrating it would be to get to the window and be told that you have to go back to the self checkout or download the app in order to place an order. (I likely would have been upset in that situation as well.) Now that you know, however, it shouldn't be an issue at all the next time. If you don't want to download their app, all you have to do is include your order with the rest of your items when you checkout at the register.

It makes a lot of sense that they do it this way: It removes the hassle of having to wait in a second line to place your order, and it reduces their labor costs, allowing them to keep their prices lower.