It is just you. You're not understanding the issue. I have read all of my email. Those 10,000 emails are 'read' on the server. But when my iDevice connects to the account, it thinks "Hmm, I haven't seen these before" and flags them as 'unread' since they haven't been read ON the device. So when I connect to a 9 year old email account with 7,000 emails in it, my iDevice thinks "oh, hey, look, 7,000 'unread on this device' emails!" And the only way to 'clear' it is to either MOVE those emails from that inbox so that the iDevice doesn't 'see' them anymore, or by loading them into storage on your device and flagging them all as read.