Thanks for your answer.
Perhaps I don’t understand you fully.
The artist who got me into this question is different.
I have the
Christiane Oelze, Hartmut Haenchen, Mozart: Concert Arias, Berlin Classics CD at hand
Christiane Oelze is:
This album neither shows on the “overview” or “release” menu pane.
It is shown on the “recordings” pane, which is a long, detailed and exaustive list.
This CD is part of the “Complete Mozart Works”, CD 6:
and the artist is correctly linked.
So I can find it - but why does the “overview” not show this release group?
Can you see my difficulty?