I'm using an iPhone 6 with iOS 9.0.2. Whenever I receive new mail, I get the notification on my lock screen. When I swipe left on the notification, two boxes appear: an empty blue box (that does nothing when clicked) and a red Trash button (which deletes the mail). Any idea why the blank blue box appears? I wanted to set it to either mark as read or flag, but no matter what I set in my swipe settings, the box remains blank. My current swipe settings are Swipe Left = Mark as Read, Swipe Right = Move Message. Based on that, I would expect the Mark Read option to show up on the lock screen notification, just as it does in the mail app. Appreciate any help!