Why application.clients array gets disordered ?

I have one application, is like a room of students. So whenever one client (flex client) is connected is like a new student in the room. I have been researching and I found that every new client is stored in application.clients

If I have 3 students connected, lets say student1, student2, student3, and student4 if I made a trace :

for (var i = 0; i<application.clients.length; i++){

     trace("student "+i+": "+application.clients.name);

}

It shows me in the log:

student1

student2

student3

student4

Now, if student2 left the room, the trace is:

student1

student4

student3

I need to have the the application.clients in order, I mean, after student2 has left the room to have:

student1

student3

student4

Please, what I can do to resolve this problem ?

Thanks in advance.