Cataloging a Quaker library collection

Our Quaker meeting has a small library that was cataloged many years ago in a very idiosyncratic way--and none of us can now figure out the reasoning. Are there other small church or meeting libraries out there who have established catalog systems that make sense for small collections consisting primarily of books about their faiths?

Have you seen this group? https://www.librarything.com/groups/quakermeetinglibrari
They seem fairly active.

There is also a group called Church Libraries.