Some cavaliers do have a wavy coat which tend to get curlier the older they get. A real problem if they are show dogs but otherwise nothing to worry about.
Cavaliers with dry eye/curly coat are the only exception but they tend to have dry coarse fur, sometimes compared to a Brillo pad, and Sophie looks as if she has soft shiny curls?
Cavaliers......Faith, The Ginger Tank and Woody.
Japanese Chins.... Dandy, Benny, Bridgette and Hana.
Remembered with love......... Tommy Tuppence and Fonzi