many duplicates when mail merging labels

[mr_malkovich]

I have Microsoft Word XP (as part of Office). I am trying to merge 120 contacts that I have in an Outlook folder into sticker labels. I choose the avery 5160 label template - 30 labels a page. Since i have 120 contacts in that folder, I should only end up with 4 pages of stickers, yet when I'm previewing the merge I see 30 pages and many duplicate labels. What am I doing wrong? Thanks in advance... James