I Want A Sundae!!

So I decide I want a sundae, but I want a double in one cup.  Sounds pretty simple.  Well, it went like this.  Hello, may I help you.  Yes, I want two strawberry sundaes in one cup.  You want two sundaes, two cups.  No, I want two sundaes in one cup.  He tells me the price, wrong.  I back up and try again.  He assures me he's got it.  I get to the window..he hands me one sundae with a sundae cup on top.  Good grief, can't anyone follow directions???