well zhashpro is not a PPS pool , so usually the first day or two are not the best, also you need to realize that the difficulty on these coins is going up in a crazy way, so do not be surprised if your earnings drop to half the next day. so what you should do is use a mining calculator, based on the average of last 24 hrs, and see if you are getting anything close to what it says 10+/- % is pretty fine.