When I sync an existing playlist using itunes it creates a second playlist
I am using the standard method of syncing a playlist from my PC IT Library to an older iphone (5C). The playlist already exists on the phone, but I am re-syncing so I can add additional songs to that list on the iphone. It does sync the playlist, but adds another that it shows as Playlist 1. It also adds that list to my IT Library on my PC. How can this be avoided?
iPhone 5c, iOS 10