Donut Headache

Most mornings when I am driving to work, I make my own coffee at home and take it in a travel mug. Every once in a while I can't be bothered (I'm usually too tired) and I figure I'll stop on the road on my way into the city. There's this Dunkin' Donuts on Route 17 that I've gone to once or twice before. Never have I gotten good service there. Also, their coffee isn't that good, which I don't really understand because I assumed all Dunkin' Donuts establishments made their coffee exactly the same way (isn't there a Dunkin' Donuts University out there for prospective franchise owners?). Anyway, my wife has had similar experiences as I have had at this place and we both came to the conclusion to avoid it from now on.
Well, I didn't listen to my own advice and the other morning I stopped in there to get a coffee and a muffin. I clearly asked for 1 large coffee with milk and sugar and a banana nut muffin. The following conversation followed:

Dunkin' Donuts Lady: "Anything else?"
Me: "No, just the coffee and the muffin."
DDL: "Okay. Anything else?"
Me: "Well... the muffin."
DDL: "Yes. Anything else?"
Me: "No. Just a large coffee with milk and sugar and a banana nut muffin."
DDL: "Anything else?"
Me: "No. The coffee and the muffin."
DDL: "Anything else?"
Me: "No."
(a few moments pass...)
DDL: "One large coffee. $2.02." (rings me up in the cash register.)
Me: "Are you f*&king kidding me?!?!?!"

I don't know why this exchange surprised me... this place sucks.

NP: nothing