There are several reasons this can occur, and some easy ways to diagnose them. The first is that you might have used different usernames for different applications. The second is that you might have used your LinkedIn account as your log-in. Try logging in with your different email accounts, and with different usernames, and see what comes up.
If your dashboard does not show positions to which you believe you have applied, never fear – if we need to communicate with you regarding any of the jobs, we’ll notify you by email. So if you check your inboxes regularly, you won’t miss a message from us.