Currently Being ModeratedJul 25, 2013 11:27 AM (in response to hiphopdancer)
1- If you autosync, any changes you make in your library should be reflected on your iPhone on its next autosync, and without creating a 2nd playlist (e.g. "favorites 1").
2- If you autosync, any changes you make to a playlist from your phone will be over-written next time you autosync. If you want to be able to edit a playlist on your iPhone, start by creating a new (blank) playlist, then select the playlist you want to change so it is added to this new playlist, then make whatever changes you want. When you re-sync to iTunes you'll have to delete the original playlist and keep the new one.
Now, perhaps wi-fi autosync behaves differently, but a wired autosync should behave as above.