Judy,
It's not a matter of categories being set up improperly, all it means is that no one has created a category for the parish yet. As you know, cemeteries are frequently associated with parishes and other religious congregations, but because they're such a great place to find vital statistics for our ancestors, they are frequently the first component of these organizations to get categorized. There are other places where most or all of the religious institutions are well-categorized, but that's because one of our members, or a group of them, had an interest in them and took the time to create those categories. I see that one of our Super Stars (members that go above and beyond the norm in their contributions to WikiTree) is the profile manager for a few of the people listed in St. Peter's, so I will point them to this thread as they may have more information for you. Have a great day!