In the movie Coraline all the side characters, Mr. Bobinksky, Ms. Fink and Forcible and Wybie, all call her Caroline even though she clearly tells them her name.

This seems to annoy her to the extent that even the Other Mother notices, who makes sure that people call her by her proper name in the Other world.

Is there an explanation to why everyone mispronounces her name? Was that just in the movie or does that also happen in the book?