MS Outlook 2003 - How to display contact names

Hi. I have an "issue" with MS Outlook 2003 that is mildly annoying, and I want to try to fix it.

When I use the buttons "To" or "CC" or "BCC" to get to the "Select Names" window to select multiple recipients for a particular email message, some of the names appear the way I want them to in the list (i.e. Lastname, Firstname, like Smith, John) but many do not. Instead, they appear Firstname Lastname (John Smith). I like to keep the list in alpha order by last name (descending), but it seems that somehow the Outlook program sometimes changes them around. I've right clicked on the names and gone into the Contact listing to change things, only to discover that they are listed in the contact windows as Lastname, Firstname! Yet, they will not display that way in the "Select Names" window! Why is this? Additionally, when I look at my actual contacts page in Outlook, all the names are Lastname, Firstname. None of them are Firstname Lastname. Any suggestions on how I can get the "Select Names" window to display my contacts in a consistent order by last name?

Thanks,
Marc