If they do not have an email address set they will not show up on your swap page
If they have no email set, they cannto be contacted, so they are not shown. Saves time!
They do not have any swaps!
If they have no swaps they will not be shown.
Do they have the same album type?
If you are collecting: Merlin Premier League 2008
and they are collecting Merlin Premier League 2007
the name will not show up on your swaps page.