What does (Unconfirmed) mean?

I've submitted a high score for the Olympiad for Ms.Pac-Man a couple of days ago, and above my score it reads (unconfirmed). Do I have to do anthing else to get this confirmed? Does someone look at it to confirm it? When I beat my own score, may I submit another one?

Thanks in advance :)

Bob (PacFan)

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