So one of my threads - someone I talk to several times a day - has messages much newer than Sunday (January 11, 2015) but in the main conversation list, it shows a blank "last message" and shows as "Sun." I even went in and deleted all 1/11/2015 messages and even found two weird messed up MMS messages by looking in Messaging (default app) which I also deleted. But still this thread is out of order. I can't figure out how to fix it - anyone have any ideas?