auto-sync with iphone 5S

[mrfart]

This might sound silly, but i don't understand auto-sync.
My phone is always too full to put anything else on it.
I only sync play-lists on the phone. When I'm done listening to them, I remove them, but when I want to put other play-lists on the phone, I often find that the phone is full.
I noticed that a lot of tracks from older play-lists remain on the phone. I end up deleting them manually in the music folder of the phone.
But when I click auto sync, mediamonkey starts to load a lot of artists from old play-lists (but not the play-lists) back onto the phone (and runs out of space obviously).
How do you prevent this from happening? And why does it do this?

Thanks

[Lowlander]

Make sure you only select what you want synced in the Device Profile and that you set it to delete all media files (do be careful with this). This will remove any media files not on the sync list and only sync what you have selected. (Tools > Options > Portable Device Sync: http://www.mediamonkey.com/wiki/index.p ... zation/4.0

[mrfart]

Thank you, Ill see if this works.