I've done a lot of matrices...and that's by far the worst I've ever seen! First, I don't think your starting points are exactly aligned (not bad, but not 100% either), so you get off to a bit of a bad start. But then obviously either your SBD source runs fast or your AUD source runs slow, since as you say they drift apart quite quickly. You would likely need somebody who has a musician's ear and/or is intimately familiar with Phish's music to tell you which is the case.