Galaxy S4 Notification tone keeps resetting by itself

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http://forums.androidcentral.com – 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. (HowTos)