It’s 2017. Technology has changed things.
see this recent conversation - Notability check before adding a release to MusicBrainz
Many people put out podcasts - or, in this case, many preachers/churches have been releasing the sermons. This would look something similar to what you are seeing.
This week’s sermon is called Suka Cita Memberi (en; Likes to give). It is 20 minutes long. The person who digitized might break it into 5 sections of 4 mintues each.
Personally, I would like to see it named 1 of 5. 2 of 5. etc. So that a person listening would know how many tracks are available.
But that would very easily explain what you see. Especially since they do seem to have released dates like the first of every month
Oh, also, they are not all released on the same label, nor added by the same user. And some of them are on cassette and have barcodes.