have a look at the play count in my iPod (see attached picture.) And then have a look at my last.fm page. Even though there are no overlapping submission still the spam filter was triggered: "You submitted a track dated earlier than your last submission."
Just have a look here: http://www.last.fm/user/DDT3/
and compare it to what was submitted from my ipod.
To me it seems that lastpod is submitting the tracks in the wrong order...
It has done this twice already. Place note that I am using the proxy as described
in one of the other tickets...