Ringtone Problem

[Bob31464]

I've had my s5 for a week and love it! I have been using Zedge for ringtones and notifications tones for a long time. The problem I'm having is that when I set a ringtone for a contact it will only stay that way for a short time (minutes to hours) and then change to my regular ringtone, for the first few days it worked fine. The crazy part is that it is also a ringtone from Zedge. The notification tones are working just fine. This is really strange. I'm thinking of uninstalling Zedge and re-installing it and see if that helps. Does anyone know of something else to try first? Is anyone else having this problem?

Thanks!