I just remembered when I first started to really realize that the Chilonim use the term “chareidi” to refer to anyone who is fully frum. It was when I watched a youtube video where a chiloni guy was explaining to some (not-Jewish) foreign workers the differences between chiloni, dati and chareidi. He used dati to refer to people who are not completely Frum. That is the general usage of the term in the Chiloni world. They generally use the term Chareidi to refer to people who are fully Frum.
Well, I guess we’ve discovered the source of your error.