Yesterday Doubletwist added playlist sync to its functionality for the Mac version of its software. I'm syncing with a Palm Pre running WebOS 1.3.1. and a Macbook pro running Leopard 10.5.8. The first sync goes OK with songs and playlist properly moved to the pre, but subsequent syncs remove the old songs from the playlist on the pre and only leaves the new songs. The songs removed from the playlist are still on the pre, just not in the playlist. This same issue occurs for me with Sallings Media Sync, Songbird, and Missing Sync. Am I doing something wrong or is this an issue with Macs?

My intent is to point DT to this thread if there are a lot of people with the same issues, or hopefully someone can help me to do the sync correctly if possible.