Hello!
That is weird, as I have just checked on my profile and that has not happened to me at all. I advise you to talk to the team of answeree to sort it out.
Perhaps it is Just something happening now, perhaps in a few hours, it will go back to normal. Maybe you have been answering many questions and the system has seen that and is a little bit confused managing answers/notifications.
Give it some time perhaps...or check with the Answeree team...I haven't experienced this issue at all.
I received an email indicating that one of my answers was chosen as Best Answer. However, when I come here I can see the notification on my account. But if you click on the question there is no indication what so ever that the answer was chosen as best answer and there was another notification that said that another comment received thanks.