However, it is obviously not a Classical album. Also in my filesystem the album is called “Tango Nuevo”, not “Summit” plus the ID3 in-file metadata show the genre “Tango Fusion”, definitely not “Classical”.
In many public db’s you will see Astor Piazzolla claimed as Classical which is why you are seeing this. Quite a grey area. In your screen shot you have two Piazzolla albums one teamed with Gerry Mulligan, the jazz saxophonist. The other teamed with the Classical violinist, Gidon Kremer. So its ambiguous.
I usually tag “Classical Crossover” in these cases. I tag a lot of contemporary symphonic and electronic film music this way as well. You might find that helps.
It was classified with Classical because of Astor Piazzola, who is/was, as you probably know, very difficult to classify. He studied with some early 20th century classical composers, too, although the exact names I don’t recall.
I was pointed towards Piazzola because of some articles I read in some mid 90s editions of Stereophile.