I just discovered an e-mail issue with both my tablet and my note 3 phone. I don't know how long this has been going but I would think it couldn't be too long. I will mark an email as unread or it will come in unread but not show up as unread in the unread count. As you can see from the below example I have 4 unread emails but it only shows as 2 unread. I am not sure which emails cause the issue nor why. Thanks.