The banner at the top that says Yahoo!mail, has the search bar (which works by the way, thank goodness), level, go ad free, and a link to my account. That banner prevents me from using the header which has the choices of All, Primary, Offers Social and Newsletters and I can't use those shortcuts when I have a number of emails open. I can't click on those either.
I'd send you a screen shot but it doesn't appear I can attach it here.