Identities Plugin Issues

i created 2 categories for my identities. column1 and column2, because I am listing speakers for an event in 2 columns.When i input the category in the MyTicket Identities plugin, no identities are displayed except for the most recently published identity, which is displayed larger than when several identities are shown.When I leave the category blank it displays like the the attached image...How do I get it to display ONLY the Identities that are in a specific category? Also, how do I get it to stop putting the most recent Identity at the top in a larger format than the rest?