Their behavior was 'incorrect'. = It was 'incorrect' of them to behave like that.
The restaurant considers jeans and T-shirts 'incorrect' attire for dinner.
He answered several questions 'incorrectly'.
(..) -Excuse me. When your wallet was open, I glanced inside... ...and I couldn't help but notice that you have several crisp dollar bills. You're incorrect. Perhaps you could look again, please. I'm very hungry. We had doughnuts earlier. I guess everyone here enjoys giving the old scroogie, huh? (..)1998 TvShow: Seinfeld Title: The Dealership Season: 9 Episode 11