I do hear a mistake at "I think I had met my match". I would be more inclined to think that it's Lindsey, mainly due to the fact that it's no big deal to play keyboards in F(which btw, 99% of Stevie's songs are in!
), BUT, on guitar, the low, open string is an E. And the mistake, sounds to me, like an open E string on guitar. Just saying, the odds are much greater, that Lindsey plucked the open E by mistake....