I suppose I could go through and manually change the track volume for the accordion according to how loud it's playing to even it out...and yeah, adjust the volume of each of the tracks to better match the original.
Thanks for the compliment, I've played with garageband some and only made a couple actual songs, but I'm fairly musically inclined and I have a good ear.
Like I said before, the software stuff was made with a Keystation 49e, I recorded the guitar with my electric guitar and iMic.