Yes, this actually happened, more than once. Even with more global awareness of world cuisines, there are still restaurants that advertise nachos when they’re really serving chips and dip. Some still serve them with whipped cream, likely because they saw a picture of nachos with sour cream on them and assumed it was whipped cream. Even with the explosion of Mexican food in Seoul, there are places who don’t understand the “queso” in “quesadilla” and serve them without cheese.
Don’t let this happen to you!