Fun fact is that I have at least one CD where there was an audio track misprint (one track repeated). I didn't actually notice until I ripped it and used Picard to analyze the tracks.

I also once found two tracks where Spotify's own data was wrong (wrong audio files associated with the album/track names).

After failing in my attempts to escalate it through Spotify support several times, I ended up having to reach out to Glenn MacDonald on Twitter to get it fixed.