Dark41,
Your Extended Tags look fine for Grateful Dead- Box of Rain, aside from the BAND issue.
If you want to read more about BAND, and have your mind boggled:
MP3Tag BAND in FLAC discussion
In short, choose one (Album Artist, AlbumArtist, Ensemble, Band, etc.) that works with your player, and remove the other ones to avoid inconsistencies. With MP3tag, you can always move the data over to another tag in the future if you change players.
So since the Grateful Dead track looks okay in mp3tag, but not in KMPlayer- it looks like I may have asked the wrong question.
Can you show us an Extended Tags... for a track that DOES look okay in KMPlayer, like Brighton Rock by Queen?
Thanks!