So I was reading RSS in Mail, and all of the sudden it switches to some Smart Mailbox view, which is really annoying as I can't view each feed separately. Not only did it do that, but it seems like Mail has reverted in that it now uses my old email account, which I deleted. My new one is still there, but now my old one is displayed beside it. I have no idea what happened. I didn't even click anything. I was just reading. Help please.