I tend to browse stuff and leave the windows open a while I went back to an open window (I have a few tabs of dnd beyond open looking through the new adventure.. this could be related to multiple tabs.)  And it is notifying me that new messages are available in the future.  I was quite surprised.  I snipped a screen shot because it was humorous to me and thought I would report it.  Pretty minor went away after I refreshed, it seems the times are being derived from the time the page was loaded not from current time.