I'm really puzzled too. Here's what is happening. When I first open Cog and click on a song to play it, it plays OK. I can do this a few times, then it goes weird. So, right now, when I stopped Cog, then clicked on song number 37, every song on that album showed up on my screen, individually, but the track that played was song number 54, which isn't on the album.
Let's see what happens when I shut down and reopen. I clicked on song number 6, that one song popped up on my desktop briefly and it started playing. I then clicked on song 16, and similarly, it played and it showed up momentarily on my desktop.
Clicked on number 38, it worked. Track 149, again OK. NUmber 93 OK, then I clicked on number 44 and track 54 plays and all the songs on that album comes up.
Hang on! It's always on the same album, so I'll delete it and try again.
But, for example, how can one add the name of an artist to a track? In iTunes, one clicks on the space under Artist, and can type the name in, in Cog, nothing happens when one clicks on the space. Is there an idiot's guie to Cog anywhere.
Many thanks for your trouble. Alan