Nirvana Smells like teen spirit ( HIDDEN GUITAR TRACK)

The Mystery Guitar track kicks in at 1:10, I removed the main guitar track, so there is an easier focus on this Second and third layer of guitar tracks. Okay, so there seems to be a guitar track in Smells like teen spirit, that has been reduced to Approx. 5 (19 Decibel) of the original volume. Why did they reduce it to that Why not just take it out when we can t really hear it on the track So many questions, for a new Nirvana mystery; ) br, br,