Apple Music tracks not available to buy
I have already bought and downloaded one Pia album via the MacOS Music app, a few weeks ago. When I went to buy another this morning it was recognised by the iTunes Store but had no buying options. You can see the contrast in the two uploaded screenshots, one showing an album and tracks available to buy (The Greatest Eighties Album) and the other showing the tracks but with no buying option (Benediction Moon by Pia). What is happening here, and have I missed something? Thanks in advance for any explanations or advice.
iMac Line (2012 and Later)