When matching file metadata to a track / release Picard compares the "totaltracks" tag of the file to the "track-count" of releases.

This is wrong for multi-disc releases. "totaltracks" is supposed to hold the total no. of tracks on the medium the track appears on. The "track-count" of a release is the total no. of tracks across all mediums.

Instead Picard should compare "totaltracks" to the track-count of the matched mediums.

See PICARD-2360 for more details