I am baffled by this issue my mom's 5S is having. It always shows a minimum of 5 unread messages in notifications for her messages app. I have tried clearing notification center I have tried deleting all of her messages threads (both sms/mms adnd imessage) I have tried turning off notifications for a 24 hour period of time and then enabling them again (a potential fix I read). Nothing seems to help. Ideas?