room.removeUser and InternalEvent

[Tristan]

Hello,

I have an extension (zone level extension) which handle logOut, userExit, userJoin and userLost events. I use those events to monitor user movements.
I miss some userExit or userLost or logOut because I see more userJoin than (userExit + userLost + logOut).
It seems that room.removeUser method does not trigger event. Is it a normal behavior or do I miss something ?
Is there an other case where no event is triggered when a user exit a room ?
Does all those events (logOut, userExit, userJoin and userLost) are always available for both Zone and Room level extensions ?

I did tests with java extension and 1.6.9 server version.

Thank you.