jPlayer next and previous buttons skip item in the playlist

Settings for jplayer:
Kind: Playlist
Autoplay: no
Preferred solution: HTML5
Preload media: no
initial volume: 80%
Initially muted: no
Repeat: none
Background color: 000000

File Format: mp3

jplayer library: 2.1.0

I've tried in Chrome (mac), FF (mac), and IE (pc) and all with the same results. The buttons always skip one item on the playlist and plays the next one on the list. Users can still hear the skipped over item by manually clicking the title link. However, this sort of renders the next and previous buttons useless.

Just tried to turn on the Autoplay option to see if that works and actually realized that
1. changes nothing regarding the next and previous buttons
2. autoplay doesn't play the next item
3. the entire item doesn't play in full. It seems to stop short 10-20 seconds from the end.