Two things I noticed:
1. Each track has Album and Track # metadata. "Brian Wilson Personal Songs" in the Album field for almost all. Two say "Wilson/Paley Sessions". Track numbers are not sequential.
2. Under 1970s for "Brian Talks About the Songs", the "It's OK" track is actually a video file, if you find the direct link. But it's only an archival photo with the audio playing over. Text appears saying "Brian on "It's OK"".