Listing users alphabetically

[Jorge]

Hi.

1. After registration (using LoginRegisterPro), users are able to edit their profile and one of the things they can change (and many have done) is their full name (I'm using title field to store the full name).
2. I have a page reference field listing my users.
3. This field is then used in a template.

What I'm trying to accomplish is this same list but sorted by full name (title field).
This should be very straightforward but for some unknown reason it is nor working as expected.

Can anyone offer an insight, please?
Much appreciated.