I am exploring Poweramp which seems to be an excellent music app.  My problem is that when I load a CD into the Music folder on my Nexus, I see one copy of the album when I open Library in Poweramp, but two copies of each song in the album.  The opposite happens if I open the Folders section of Poweramp -- I see two copies of the same album, but each has only one copy of each song in it.

How do I manage to see just one copy of each album in the Music folder, with just one copy of each song in it?

I have had a Nexus for a couple of months.   Among the notifications in the dropdown swipe from the top of the screen I have always had a battery status readout.  Now this battery information is no longer in the dropdown.  What have I done to eliminate it?  I've been through the Settings and can't find something I've turned off, or can turn on to reactivate it.  Can anyone advise?