There is a member on FF, Dennis Bender, who has replied to three of my messages in the last 24 hours, but the messages he replied to don't she that he has read them--but he obviously has. 

Since he is new I wondered if he was starting a new thread instead of replying to the existing thread but I see the my message replied to below his message to me, and the reply is a "reply to message #797591," as one example. 

So I'm curious--how come my messages to him don't show as "read?"