double entry when inserting into database

[eluser]Unknown[/eluser]
does anyone know why i would be getting a double entry when inserting data into my database?

model

Code:

function entry($age, $user) {
  
  $query_str = "INSERT INTO entries (age, user) Value ('{$age}', '{$user}')";

  $this->db->query($query_str, array($age, $user));
}

When i submit i get the same entry twice, not sure why when i only have one query