Only earning 1 diamond when I level up

I'm a level 46 player but I only receive 1 diamond as I move up in levels. Wouldn't think much of it but I've played this gamed before and had to uninstall/reinstall losing my original level 42 status. My first go around, I was given 5 diamonds each time I moved up a level.   What's the deal? Anyone else have this problem or know how to fix it?