Not mistakes, perhaps, but I love the use of alternate tracks, usually on Capitol in old LP days. They would often use different tracks for stereo and mono releases of the same album. Probably a question of frequency. And Thomas Shepard's quad mix of the COMPANY LP, and his more recent NIGHT MUSIC CD remix. Fun, fun, fun.
Well-well-well-what-do-you-think-of-that-I-have-nothing-here-to-pay-my-train-fare-with-only-large-bills-fives-and-sevens....