Actually, in most cases (particularly with Vauxhall and Southpaw), there were more than one internal versions of these discs. I have two Vauxhalls, one as a single disc (with the bonus tracks tacked on after) and the other had two discs (one of the album itself and the other of the bonus tracks). Southpaw has different references as well, drastically different in fact as the first is more of a raw transfer (dated 2004) with very different bonus tracks than the second one (dated 2005). They represent different stages of the mastering process. They were simply pressed for the people who were working on these projects to listen to for errors. Some are discs from Sire/Rhino and others are from the mastering company, DigiPrep.
As I've said, I can give track listings for those who contact me with offers, but I'm not posting them publicly.