Time question

[macfan 57]

I just listened to the Time album again. Even though, I like Behind the Mask better, I still have to say that Time is still a good album, especially with the revised tracking order that someone posted on the Ledge a while back. I just have a question about Christine & Dave Mason. I noticed in the CD booklet, on most of Christine's songs it lists Michael Thompson on guitars and on Dave Mason's songs, it lists Steve Thoma on keyboards. Does anyone know who these 2 people are? It almost sounds as if Christine & Dave did not play on each others songs. Does anyone know if there is any sort of personal or professional problem between Chris and Dave?