Selecting a list using php

[Webiter]

Emails being saved to a list using the php below. There is however a gap being created at the top of the list as the attached image demonstrates.

Why will the saved emails not start at the top of the field?

<?php

    $List  = $_POST['List'];
    $Email = $_POST['Email'];

    if (file_exists("data/$List")) {
        $myfile = file("data/$List");
        $fh = fopen("data/$List", "w");
        for ($index = 0; $index < count($myfile); $index++) {
            if ($Email != rtrim($myfile[$index])) {
                fputs($fh, $myfile[$index]);
            }
        }
        fputs($fh, $Email . "\n");
        fclose($fh);
    } else {
        $myfile = fopen("data/$List", "w");
        fputs($myfile, $Email . "\n");
        fclose($myfile);
    }

?>

[fobos]

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