PHP mail form duplicating emails sent

[compmech]

hi there.

i have the following PHP mail form (below). my intention is to do basic validation then send 2 emails 1) to me to add the user to a list 2) a confirmation email to the person who subscribed.

if i use only the top 'mail' line:

mail($emailTo, $subject, $message, "From: $email");

i get only one email sent (as expected). if i use only the bottom 'mail' line:

mail($email, $subject, $message1, "From: Soccer Club <[e-mail]>" );

the recipient receives the same email twice (duplicated) - not what is intended. if i use both 'mail' lines both recipients receieve duplicate emails.

here is my full code. any help would be appreciated. i want each recipient to receive only one email.

<?php
//test if a dropdown item is selected AND checkbox selected or not
// Handle POST method.
if ($POST)
{
$email = $POST['email'];

        // Compose simple text message:

        $message =      "Message from $name ($email)\n\nAdditional Notes:\nMessage sent to Webmaster\nAdd to adelaidevillasc.com email list";
           $message1 = "Subsciption confirmation $name ($email)\n\nThank you for subscribing to Soccer Club's weekly news and match reports\n\nThis is an automated response.\nPlease do not reply to this email message.";
        $emailTo = "[e-mail]";
        $subject = "Email Subscription to club.com";

        // Send message
        if ((empty($email)) || ($email == "your email address")){ //test if email blank or contains default text
             echo "Use you browser's back button to re-enter your email address";
             }else{
                    //add to email list note
                  mail($emailTo, $subject, $message, "From: $email");
                   //email subscription confirmation to subscriber
                 mail($email, $subject, $message1, "From: Soccer Club <[e-mail]>" );
              // Thank the user
            echo "Thank you for subscribing";
             }

    }
    else
    {

    ?>

    <form action="<? echo $_SERVER['PHP_SELF']; ?>" method="post">

       Weekly match reports<br />
        <input type="text" onFocus="this.value=''" name="email" value="your email address"/>

        <p><input type="submit" value="Subscribe" /></p>

    </form>

    <?php

    }

    ?>