Forgive me if it’s been mentioned before (search says both “playlist” and “bug” are “too common” terms to search).. but I noticed the following:
– Start WiiMC and go to Music
– click ‘+’ on a music-containing folder to add its contents to the Playlist.
– click the ‘pause’ icon to start playing (btw, is that a bug too?., it starts up with the pause icon rather than a play arrow icon)
– OBSERVATION: 2nd song in playlist begins to play.

This is repeatable, happens every time.
Same happens if (while nothing is playing) you click on the Playlist icon and then hit Play.