Well, it would make sense if "Look down at my woman" & "Who's knocking" were recorded circa "Man of the world" since that Spencer single was on Immediate (as was the MOTW single) but yeah, the details on those tracks have always been annoyingly vague.
Nah, I don't think they'd be outtakes from his selftitled Reprise solo album as that Reprise stuff was after the "Immediate days" and sonically speaking those two tracks sound more Immediate that Reprise to me but like you say, who knows? ...and hopefully we will find out all about this stuff someday somehow.
John