Solved
Virtual Server HTTP Host + Round Robin
To a Virtual Server is it possible in Load balancing method selecting "HTTP Host" and "Round Robin" at the same time?
As it is now with "HTTP Host" it looks like it uses Static with the 2 Real Servers. 
The purpose of "host" load-balancing is to act as a reverse proxy for multiple webservers.
Host: www.server1.com -> forward to <local server 1>
Host: www.server2.com => forward to <local server 2>
Host: www.serverN.com => forward to <local server N>
(so not really load-balancing)
If your Host headers are the same (as in your screenshot), doing Host-based balancing is pointless. Switch to round-robin or any other desired mode.
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.