Galaxy S4 Notification tone keeps resetting by itself

[Anne Gehman]

I have noticed that anytime I restart my S4 or turn it off and back on that the notification tone changes to postman no matter what other tone I have it set on. Has anyone else experienced this or know of anyway to fix it? If I wanted postman to be my notification tone I would have set it to that on my own, don't need my phone choosing for me.