A new updated has been released which now paginates your leads. By default 10 leads are shown per page.
To increase the number of leads that are shown per page Hover over the "Show 10 per page" menu shown below & select the # of leads you wish to show per page.
Why was this done?
Showing less leads per page allows us to draw the leads screen faster, when you have 100 or more leads to show for the month the system would sometimes take a few seconds to load.