User reference with views

Hi

I have a drupal site with 3-4K users and i want to use the user reference in many fields.
Using just the username was not so practical, since we know people by real name and not by username.

I created a view to display "[lastName] [firstName] (username)" in order to more accurately display for a user to choose.

However, although the view was displayed correctly, the autocomplete was working only for the username

for instance,
the list was displaying "Dimitris Kontokostas (jimkont)"
but when i typed "Dim" nothing returned
when i typed "jim" my record return

which means that the views are working only for display and not for creating the autocomplete list

I guess this is a bug, unless this is the intended work-flow.

Cheers,
Dimitris