Last Played Date

I have ran a script to reset the Last Played Date on some of my songs...

After iTunes syncs up with iMatch, the Last Played Date reverts back to what it was...

How can I update iMatch with the no Last Played Date?

I do this because I have Smart Playlist that used the Last Played Date and I want to add some song back into that Playlist, but not others. I can edit the Smart Playlist to let the Last Played Date, but that adds the songs I don't want back into the Smart Playlist that I don't want in there yet.

tommy