More frustrating than bad

Me, at the drive-thru speaker: I'll have a number six, cheese only, with a coke.
Speaker-chick: A number six, plain?
Me: No, cheese only. With a coke.
S-C: So, no meat?
Me: (thinks, wtf) Ok, *meat* and cheese only. With a coke.
S-C: A number six, with a plain cheeseburger, and a coke. Please drive up.

Communication breakdown much?