Glad I could help! Your post gave me a walk down memory lane. I'd forgotten all about the trips I used to do to this local music store that carried bootlegs. The Nirvana section was substantial. I remember having a number of them with the mislabeled tracks, including the one you mentioned. I also picked up a few live show recordings that were unlistenable, though luckily the store accepted returns.

I found an archive of the full set that includes the Nothing Compares 2 U track. Seems that they opened the gig with the song [0]. There's a neat story in the link about the show and how this bootleg got around.

  Mr.Bungle
  Date: 1990-05-27
  Venue: (BBurnett) @The Full Moon Saloon, San Francisco, CA
  Recorded By: Sean Lyons
  Source: Sony Stereo Clip-On Mic > Cassette Walkman > audience master cassette > Tascam 3-head Professional Cassette Deck Model 130 > Tascam DA40 > Tascam CDRW5000 > Samplitude Professional 7.11