Good news that your PC has at least identified the Beosound 6.
Now try your BS 6 on N.MUSIC to see if you can copy tracks. You might also see if the Beoplayer allows you to delete tracks or albums.
I wouldn't be too concerned about the charging anomaly. I have experienced this a few times when using the PC connecting cable, versus the mains cable. Shut your BS 6 off for a 10 minutes or so, and then go back into settings. You may see that the device is now fully charged.