Even though dictionaries do make the case for the definition that you presented, I think that some people consider "mortified" as a word meaning strongly repulsed and/or fearing something almost to the point of figurative or literal death.
This wrong usage would be seen in something like: "You would be mortified when the hangman places the noose around your neck."
The Latin source for the word "mort" is linked to death. (Think mortality, mortuary, mortician, immortal, etc.)
But I digress...