A lot of Prince's original mixes for outtakes were quickly mixed to cassette. I totally get wanting that original mix, but I'm not going to complain about new mixes. Granted, I'm not a big fan of the reverb choice that Bolas made, but I think he got everything else pretty good. The "combining different versions" is just how things evolved over time as he worked on those tracks. That's what's left on the multitracks. Bolas even described flying in isolated parts from Prince's original mixes in order to use material that Prince erased from the multitrack tape.