AndroidApp - Playlist: new created instead of updated

[W!cked]

I've a problem with the playlist-function on android.
Everytime I edit, add some songs to it and finaly save my list with the same old name, subsonic is not updating the playlist but
creates a new one with the same name.

Playlists:
XYZ (19)
XYZ (23)
XYZ (27)
XYZ (28) <--newest

Any ideas whats going on?