There is a limit to the number of applications you can view on the Candidates page. Candidates are organized from top to bottom by "featured candidates" (notice the star icon next to the applicants name) and by date of application.
To load more applications into view, make sure to decline the candidates you are not interested in. To decline a candidate, click the "Decline" link in the top right hand corner after opening the application page. Or, you can click the three dots to the right of the applicants name on the Candidate page ("...") and select 'Decline".