This ONLY happens when using the Search People box in the Outlook toolbar. The names are NOT duplicates and do not show up more than once in the To field of a message. When I search Bob Smith in the People Search box, it will show 1 result. I click on it and it shows the full contact card. Then, I'll type Smith, it will show 1 result (even has the same contact picture). I click on it, and only get the E-mail Properties card. Same person, same picture, 1 result each time, different results. Good one, huh?