Cookie的结果不一致

If I push F5 button (refresh) for several times, the result sometimes different, like an inconsistent result, I just want a fix result. I kept looking the resolved of problem until now but I still failed and I don't know where are the mistakes.

the result is like this:

index.php image:

index.php:

<?php   
    include('c2gcon.php');
    include('logincheckmember.php');
    include('logincheckadmin.php');
    //include('urlmanage.php');

    //include('urlexplode.php');
    $urlget = $_GET['url'];
    $urlexplode = filter_var($urlget, FILTER_SANITIZE_STRING);
    $url = explode("/", $urlexplode);

    $urlsave=$url[0];
    //print_r($url);
    echo "urlsave=$urlsave<br>";
    if($urlsave=='home'){
        include('uc.php');
        include('coorand1.php');
        include('home.php');
    }else{
        echo "<script language=javascript> alert('gila lu')</script>"; 
        echo "<br><br><br>gila lu keong<br>";
        include('uc.php');
        include('coorand2.php');
        include('home.php');
    }
?>

refference: coorand1.php and coorand2.php