repeticion de contenidos en insertar registros

[rascabuchitos]

<?php
$state = false;
if ($_POST['action'] == "add") {
$conexion = mysql_connect("localhost", "mayito_luchito", "ninguna");
mysql_select_db("mayito_conta", $conexion);

$que = "INSERT INTO empresa (comprobante, ruc, razon) ";
$que.= "VALUES ('".$_POST['comprobante']."', '".$_POST['ruc']."', '".$_POST['razon']."') ";
$res = mysql_query($que, $conexion) or die(mysql_error());
$state = true;
}
$conexion = mysql_connect("localhost", "mayito_luchito", "ninguna");
mysql_select_db("mayito_conta", $conexion);

$queEmp = "SELECT * FROM empresa ORDER BY comprobante ASC";
$resEmp = mysql_query($queEmp, $conexion) or die(mysql_error());
$totEmp = mysql_num_rows($resEmp);
?>