Well, WHATCHA DOIN' appears on the Jermaine Jackson PLAYLIST - THE VERY BEST OF JERMAINE JACKSON CD and, according to Discogs, the song was written by Chris Clark, Berry Bordy and J Jackson. It's a non-LP B-side and had not been on CD before and it is a whopping 5' 29" long. Sounds like the same song to me, Paul.
SWI