iTunes 12.3.2 does not merge tracks into existing album
I wanted to append a few tracks ripped from my vinyl singles as bonus tracks to an album in iTunes 12.3.2.35. I added the albums to a playlist and added the correct albums titles. Yet somehow the tracks weren't added to the appropriate albums. They remained in a single album (with two different titles!) that had an identical title to an already existing album.
I checked and double-checked, but all fields were entered correctly. I could force to merge one album by selecting tracks over two albums (one regular and the other the album with two titles above) by renaming the album from "title" to "title -" and back. I concluded this must be a bug so I tried the same with the other. Unfortunately this didn't work.
This is what the album looked like in iTunes:
and this in the Finder:
I finally managed to group everything into a single album by adding a fake album artist tag and removing it. But there must be something really off with the new iTunes and grouping into albums.