The Email Forwarder plugin saves attachments to the profile of the candidate or employer by matching their email address.
If this is an issue (say a recruiters emailing you multiple applicants):
Delete the email address from their Perform Zone profile. When a new email appears, add the Candidates name via the New Person pop up in Perform Zone.
NB: we are developing a website wherein recruiters can upload their applicants and you get them assigned straight into your job.