Smart Playlist Doesn't Sync Correctly With iPhone
I have a smart playlist that has 50 songs in it. When I sync my iPhone to my computer, the counts are updated, and iTunes changes the songs in the playlist based on if they were played. New songs upload to the iPhone, but when the sync is complete, the iPhone reverts back to the original songs that were on the playlist beforehand. Resyncing, no songs are uploaded to the iPhone. I've tried deleting the old playlist, syncing, then making a new one with the same name, and then syncing again, but that one ended up having that same old 50 songs in it even though I watched it upload the new songs! My only solution has been to use a plain playlist and change it all the time, but that defeats the purpose of a live updating smart playlist. How can I fix this?
iPhone 4, iOS 6