I give up! Need PHP Help

Hey guys,

I have literally spent the past 3-4 hours trying to figure it out. Its probably something really simple but I cannot get it to work.

I have a simple form

<form method="post" action="">
<input type="text" name="searcher" /><select name="searchers">
<option value="keyword">Keyword</option>
<option value="author">Author</option>
<option value="topic">Topics</option>
</select> <input type="submit" name="submit" value="" />
</form>

HTML:

which is connected to this code

<?php

if(isset($_POST['submit']))
{
$searcher = $_POST['searcher'];
$searchers = $_POST['searchers'];

mysql_query("INSERT INTO recentsearch (search, type) VALUES ('$searcher','$searchers')");

 echo "<script type='text/javascript'> window.location = 'search.php?q=$searcher&search=$searchers'; </script>";
}
?>

PHP:

When I run it, its suppose to enter whatever is in the input to the database. Instead, it adds 2 duplicate rows. I have done it this way for years and never had a problem like this.

Any help is appreciated.

Thanks,