Oh man, this is WEIRD. As I previously noted, I'm having issues with the media controller (MC), so I've been monkeying around with it. I ended the Google Play Music app 3 times (Task manager> END) and each time, by hitting play on the MC, it restarted the music through Play Music.
Now here comes the really weird thing: the fourth time I ended Play Music, some of my music started up when I hit PLAY on the MC, and I (for the first time) got album art, AND the program that is now being controlled on my phone is "Music" which has an icon that has a blue outer ring, and inner white ring, blue triangle, and a musical note on the right side.
I then started Pandora and just like with Play Music, "Music" songs still show (both title and album art, unlike Play Music) on the MC. Ending Music doesn't help. The skip button will jump Pandora to the next song, but I can't get MC to stop showing the last song played through either the Music or Play Music apps.
I suspect that "Music" is a Samsung app, as I can't find it in the Play Store.
CONFUSED!!!!