I wonder how much P2P file sharing networks contributed to the confusion of this song with Bob Marley. One single MP3 with the wrong ID3 tags would spread like wildfire.
The article mentions a YouTube video, but the song was popularly though to be by Bob Marley long before YouTube came about.
I remember it being labeled as Bob Marley on BearShare Kazaa and Limewire. I was just talking about this a few days ago.