The same thing has happened with Bibles. You never see a Bible that is labeled “Protestant,” but every Bible you pick up that is simply labeled “Bible” is missing the deuteros and is obviously the Protestant Bible. You have to specifically look for the phrase “Catholic Bible” or “with Apocropha” if you want a Bible with all the books in it.
Of course, historically speaking, I think that most of the time when the early Church Fathers refered to the Church, they called it either the “Church” or the “Catholic Church,” not the “Christian Church.” This was done to emphasize the unity in the one true Church. There were other heretics who considered their own congregations to be Christian churches, but they believed different doctrines and were not a part of the whole Church. So whenever people wanted to refer to the one true Church (even the heretics), they refered to it as the Catholic Church. St. Augustine puts it this way:
*“We must hold to the Christian religion and to communication in her Church, which is Catholic and which is called Catholic not only by her own members but even by all her enemies. For when heretics or the adherents of schisms talk about her, not among themselves but with strangers, willy-nilly they call her nothing else but Catholic. For they will not be understood unless they distinguish her by this name which the whole world employs in her regard” (The True Religion 7:12 [A.D. 390]).
“We believe in the holy Church, that is, the Catholic Church; for heretics and schismatics call their own congregations churches. But heretics violate the faith itself by a false opinion about God; schismatics, however, withdraw from fraternal love by hostile separations, although they believe the same things we do. Consequently, neither heretics nor schismatics belong to the Catholic Church; not heretics, because the Church loves God, and not schismatics, because the Church loves neighbor” (Faith and Creed 10:21 [A.D. 393]). *
So all things considered, I guess I don’t mind having to look for the word “Catholic” seeing as how the early Catholics kinda had to do the same.