I found a major bug that creates inconsistency in the database. When a user registers as an applicant, TWO profiles are created automatically with the same name, etc. Afterwards, when this user edits his profile, one of them is modified, not both of them.
So you can see in the Resume Administration page that there are two profiles that go to the same user page (i.e. mysite/resume/148 ) but only one is the correct one... The problem of this is that when you have a lot of users, there will be many unused profiles... and the Resume Search engine is indexing all of them.