yes it makes sense....
the message that caused the problem was one i used to read in order to copy paste players IDs in the search section that would be suitable for Hellas u21...
in order to do that i opened 2 or 3 new pages in the Mozilla one for searching, one to read the message, and one to send messages to the managers...
somewhere in the process i guess i marked the message unread while navigating in the pages...
or something like that...
p.s: i guess that was a bug and not a message from Santa...