I notice that when using Spotify but not playing a song, pressing the iPhone's volume buttons adjusts the system volume, not the music volume. Only once a song starts playing do the volume buttons adjust the music volume. The phone remembers the last music volume setting, so if the volume happened to be turned up really loud the last time the app was used, you have to start playing a song at full volume in order to turn it down. Any ideas if this can be fixed? It would be nice if the volume buttons would change the music volume whenever you're in the app at all, not just once a song starts playing.