Choral Public Domain Library

I came across this "composer" recently, because currently it sorts under "1" in the list of composers. So far, only one work page (here), added earlier this year; on this page, Composer is listed as Anonymous. I reached out to the editor involved, but he hasn't responded yet.
The word "Organum" occurs in six other pages.
I think this would be better as a category (and subgenre). Wikipedia calls it "a form of heterophony", so it seems this is important historically. Perhaps these are recent concepts? However, I am far from having expertise in this area.
The form of this composer's name doesn't quite fit the usual conventions. Also I suspect that there is a lot of this on CPDL in the various anonymous and chant categories already.
Help, please.

Compositions by Anonymous (why is that capitalized as if it were a name???) needs certainly rethinking, lest we get to a point where someone planning to upload [[Magnificat LXII (Anonymous)]] isn't willing to check whether it's perhaps already hosted under another page name (and how many of us would be willing to check that for him/her?).

A laudible makeshift practice has arisen of adding (source) in front of (Anonymous) as at [[Puer natus est nobis (D-ERu 473-1) (Anonymous)]]. There's also [[Gloria, Old Hall 1 (Anonymous)]] and [[Messe de Tournai (Anonymous)]] which similarly get the point across. Perhaps there's an automated way of having [[Pascha nostrum (Kodex des Magister Nicolaus Leopold) (Anonymous)]] appear on a 'composer' page titled [[anonymous (Kodex des Magister Nicolaus Leopold)]]. Otherwise I'd suggest we start replacing (source) (Anonymous) with (anonymous, Source): hence [[anonymous (School of Notre Dame)]], assuming the unpopulated [[Anonymous (Medieval Organum, c. 1000-1100)]] to be needed for repertoire common to the sources F, W1, W2… <strike>Did something once link to that page, btw?</strike)