Window Headers Yahoo Mail Showing Unread Messages In Header Of Window?

Yahoo Mail showing unread messages in header of window? - window headers

When I get my Yahoo mail on my phone and delete the messages there, then Yahoo mail will not be displayed on your computer, the news, but in the head at the top of the window always says that I do not read messages. Now is the 2345 United Nations, and read messages at top. It's just a little boring, and I can not say, look at my head when I really new news, suggestions?