The Yahoo mail system does not sort mail right, what is important to me is not being found by the yahoo mail system. You seriously need to stop trying to sort the mail, and stop automatically making "Primary" a default for the mail. I get hundreds of emails and this way of sorting only shows me a handful. I want to see everything at once and am tired of this default setting. There needs to be a way for the user to choose how they want their mail sorted so they can set their own default. Also, the phone app is terrible. I never can see all my emails on the app. I will go through what I can on the app and when I get to my computer I find hundreds of emails that never showed up on my phone. Stop trying to sort our mail, you're getting it wrong. Stop making Primary a default setting, its terrible.