Facebook Fan module always shows avatars in duplicate

Bijou,
JFBConnect doesn't have control over the avatars that are displayed. If you only have a few "Likes" for your page, duplication can happen. As your Like count grows though, the likelihood of a duplicate showing goes down a lot.

Unfortunately, the duplicate problem is a bug on Facebook's end that's been reported to them before. It will be up to them to prevent that from showing.

Hope that helps explain,
Alex