I have two questions about web messenger:

 

Question 1:

I have two users that login to my website. User 2 doesn't get notify if user 1 send him/her instant message unless user 2 has his/her web messenger opened. How do I change this behavior so user2 is notify even when he/she doesn't have web messenger open. If opening web messenger is a must, is there a way to position it on the task bar similar to the way facebook does their web messenger?

 

Question 2:

Why is it that I sometimes get notify that I have send myself a message when I try to start an IM conversation with another person?