window have change protocole or i bug ?

hi i am french and i hope you will understand me
and i hope too they are people here

so i have just seen 99% of my friend say i am offline
i have try to disconnect/reconnect but i am offline ...
and i was just see when i am in contact list when my cursor is in front of people in the information there are write "you are not in the contact list of this people" (in french : vous n'etez pas dans sa liste de contacte)
but all say i am in here contacte list
and just 1 people who i have add recently say me he see me online and this people have not the message "you are not in the contacte list of this people"