Hi, and thank you for your reply!
I have actually been suffixing any artists that are being separated my Apple Music with a ., this tends to work for a time. I dont suppose it makes much difference if it is an X or a .
In my media file for each artist I start with the artist as the folder name, and then in that folder I list them by year of release - dot, space and I prefix each album with a * for a lossless album, or a ' for an MP3 album. - the album name. I find this successfully enters every album to Apple Music (or iTunes) quite successfully. I know that Apple Music will know of the release year anyway but this keeps my media file in good order.
If, however I have to edit an artist IN music or iTunes, then it removes the year for every album the artist released in my media file and I then use the other collection to add the dates back in, a bit of a task for large collections but doesnt take too long.
I do find however that Apple Music does further separate albums even if suffixed by the . (dot), thus I have allowed it to create another artist pane for the same artist. I know my back-up and my media files are spot on; if Apple Music wants to further differentiate then I let it; as long as I know what is right for each artist.
Thus even with your explanation, it does indeed seem that Apple Music has a mind of its own. I have been editing this way for about 10 years and Apple Music always wants its 'last laugh', I know what is right, thats what matters.
I did recently discover that certain albums will not play on my iPhone, this was a collection of Queen albums that a friend of mine gave me that were later releases with bonus tracks, and each album having two discs. I still have my original CDs for this artist so I added them to my library and back up and found that they do work on my iPhone. Thus I created two artists called Queen; one called Queen (orig) and the other called Queen (dot). This allows me to synch the correct albums for this band that WILL play on my iPhone; the Queen. albums will play on any device but not the iPhone, only slightly inconvenient but I know what works and what doesnt.
You may have noted that I always mention Apple Music? this is because none of this separation happens in my iTunes library - creating another copy of my music library on my other Mac was an experiment to find the differences between the two programs. I used to keep the music and everything all on one Mac but when OS Catalina was released, iTunes ceased and it became Apple Music. A completely different program for music but I found it wouldn't play ball. I could not synch any music anywhere with it, even using finder. Someone gave me an older Mac mini and I got it working and downloaded/installed an OS on it that featured iTunes - the Mac mini is for my music. I can sync to both my older gen' iPods and my iPhone using the Mac mini and iTunes.
I appreciate your reply to my original question. It does however seem that Apple Music does in fact have a mind of its own! Just as long as I know the difference, my music library is not a public library so I can keep control of it and understand all the prefixes and suffixes I have added over the years. I still say though that Apple OS is the platform for collecting music. I had a very bad experience using a Windows platform; basically it diluted every single album down to one song per album and then just left the listing of one song per album; it then removed the actual music leaving just an empty listing! Microsoft has its own rules, as does Apple but I prefer Apple every time.
Thanks for your reply, I hope my response makes sense to you, Thanks again, Mark.