WMP sync - files not deleted

I download a few podcasts every week on my computer. New podcast files get added to my library and old ones get automatically deleted. I have set up windows media player to sync with my sansa clip+ player. My problem is that new episodes get added to clip+ but old ones don’t get removed automatically.  Windows media player shows that it is removing the files during the sync but the files don’t get actually get deleted.  Managing media on my clip+ has become too cumbersome.  I am using the latest firmware.  Is there a fix for this issue? Thanks!

It’s not a solution but a workaround until this can be figured out: you could delete your podcasts from the Clip after you listen to each one. Fast and easy, if you do it at the time.