Invincibleqc: Thx for that info, this could explain indeed that despite a player counter like 35/70 the server is reported as full.
But I yet do not understand, why the server is full and a moment later 2-3 Player have logged in successfully, as the player counter indicates.
And in general, I've never experienced until now a server that is full for 24/7 over a whole week. Could it be, that players block somehow the server?