26 of your 37 confirmed rhythms can produce a date. The other 10 are waiting on one past occurrence to count forward from.
Grouped by who holds them. NephAI knows each one’s name and owner and nothing more — no source has been recorded against any of them yet. That is a gap in what it has been given, not a judgement about anyone.
The definition names the stake president as owner.
Assigned to the stake presidency counselors.
Record-keeping responsibilities carried by the clerks.