Man i'm so glad you replied on one of my tracks so I got to listen to this !!
you can compose stuff no problem whatsoever. I can tell you have very good critical hearing, as you did not let anything disappointing enter your track. I dig you!
if you ever want help with mixing and mastering, or just about anything, feel free to ask!! (btw this is not my active music account, its on soundcloud, if you want to stay updated :) )
about the loop, It sounds like a Newgrounds glitch, your probably started and ended the export at the start of a bar and at the end of one...and thats supposed to be ok