I think as long as we know they're elders, its fine. I disagree that one line is better than two, and that both should be there in order to help clarify the more colorful and meaningful title.
The largest religion in the game, Sanguis Astroism, has 12 elders in total with 9 elder titles encompassing them; or so the wiki states. It'd be safe to assume that most religions don't have that many elders, as I've seen personally in every religion that I've been a part of, and the influx of titles would be rather low.
On the note of too may titles, let me point you to secular titles. Whereas I'm suggesting 2 titles solely for elders, realms can assign a council, duke, lordship, and marshal title all to one noble - even more if one holds more than one council position - making my suggestion hardly cumbersome to what exists already.