Yeah konev, I know this problem. There are some settings in your profile as well that may help in this respect. You may be able to set whether you receive such notifications at all. I used to receive a lot, but now I get almost zero.
If you need more detailed help, I can look up my settings for you. Just let me know.
It's getting rather annoying, regarding that I have over 10000 un read messages from CHESScom and its kind of flooding out every other message I get. Thanks