1. create a new playlist ex: test. which contains three songs ex: A, B, C 
2. Go to Music folder, play some song.
3. Go to Now PLaying and see "current playlist", lets say it is having songs E, F, and H
4. Now play song H, try to add H in the already existing playlist "test"
5. press "save playlist".
6. Now go to playlist "test" and see its contents.. it is updated as E, F, H. This indicates that previous "Test" which has A,B, C has overridden
7. So we cant add song "H" to already existing playlist which has songs A, B, C
8. "Save playlist" is just overriding the already playlist with the "Current playlist"


Version:
LMS: 7.7.1
9557