On the Auto-Sync to device tab you don't have the option to remove files from the device enabled, thus sync won't remove files from the device under any circumstances. On the Auto-Sync to PC tab you don't have the option to have Playlists synced from device to PC.
That's exactly what I want it to be.
PLAYLIST IN MMW: 11 titles
PLAYLIST IN MMA: 11 titles - of which I mistakenly removed 6 titles
USB cable sync: MMA playlist is not updated
Since there are 11 titles in MMW, 11 titles would have to be present in MMA - but they are not - but only 5