Hello. I have changed my email address in all project. All statistics are in new account and credit history for each suitable project is correct. However in the combined credit history all credits are granted in the day, when I changed email address. They not includes earlier history of granted credits. Can someone help me?

I'm pretty sure that's the way it is, since email address is used as an account identifier. As far as the stats sites are concerned, you have a new account. Be happy you got all your credit back; I'm still waiting for Predictor to decide whether it's dead or not to get my credit from them, as they aren't currently exporting stats--so the data all the stats sites have is half a year old.