Lately, I have noticed my playlist disappear and new songs getting saved into my song list. Last night I saw someone else streaming from another mobile device that I didn't recognise. I logged out everywhere, changed my facebook password and added two-factor authentication. That seemed to do the trick, however, this morning I see another unrecognisable mobile device using my account again.
Again I have logged out everywhere. Is there anything else I can do?
Thanks in advance.