Terry Wood(s)

Is Terry Wood, who sings background on "Shame" by Randy Newman on the album Bad Love, the same guy as Terry Woods, who sings background on "Heaven Help Us" by Ray Charles on the album Genius Loves Company?

If so, which last name is actually his?

While we're talking about "Heaven Help Us", anyone have any idea of Chavonne Morris and Sheven Morris, both credited with background vocals on that track, are the same person?  If not, might Sheven Morris actually be named Steven Morris?