Contact Form Sending 3 Copies to Recipient - php

Question

I have a contact form on my website which calls a .php mail handler to send off the inquiries. Each time an inquiry is sent off I receive 3 copies of the email.
Any ideas what could be causing this?
The following script is in the header:
<script type="text/javascript">
$(window).load(function(){
$('#form').TMForm({
ownerEmail:'admin#endlessflooring.co.nz'
})
})
</script>
The contact form is as follows:
<form id="form">
<div class="success_wrapper">
<div class="success-message">Contact form submitted</div>
</div>
<label class="name">
<input type="text" placeholder="Name" data-constraints="#Required
#JustLetters" />
<span class="empty-message">*This field is required.</span>
<span class="error-message">*This is not a valid name.</span>
</label>
<label class="email">
<input type="text" placeholder="E-mail" data-constraints="#Required #Email" />
<span class="empty-message">*This field is required.</span>
<span class="error-message">*This is not a valid email.</span>
</label>
<label class="phone">
<input type="text" placeholder="Phone" data-constraints="#Required #JustNumbers"/>
<span class="empty-message">*This field is required.</span>
<span class="error-message">*This is not a valid phone.</span>
</label>
<label class="state">
<input type="text" placeholder="City" data-constraints="#Required #JustLetters"/>
<span class="empty-message">*This field is required.</span>
<span class="error-message">*This is not a valid city.</span>
</label>
<label class="message">
<textarea placeholder="Message" data-constraints='#Required #Length(min=2,max=999999)'></textarea>
<span class="empty-message">*This field is required.</span>
<span class="error-message">*The message is too short.</span>
</label>
<div>
<div class="clear"></div>
<div class="btns">
send message</div>
</div>
</form>
And the mail handler is as follows:
<?php
//SMTP server settings
$host = "smtp.host.com";
$port = "587";
$username = "";
$password = "";
$messageBody = "";
if($_POST['name']!='false'){
$messageBody .= '<p>Name: ' . $_POST["name"] . '</p>' . "\n";
$messageBody .= '<br>' . "\n";
}
if($_POST['email']!='false'){
$messageBody .= '<p>Email Address: ' . $_POST['email'] . '</p>' . "\n";
$messageBody .= '<br>' . "\n";
}else{
$headers = '';
}
if($_POST['phone']!='false'){
$messageBody .= '<p>Phone Number: ' . $_POST['phone'] . '</p>' . "\n";
$messageBody .= '<br>' . "\n";
}
if($_POST['state']!='false'){
$messageBody .= '<p>Suburb: ' . $_POST['state'] . '</p>' . "\n";
$messageBody .= '<br>' . "\n";
}
if($_POST['message']!='false'){
$messageBody .= '<p>Message: ' . $_POST['message'] . '</p>' . "\n";
}
if($_POST["stripHTML"] == 'true'){
$messageBody = strip_tags($messageBody);
}
if($host=="" or $username=="" or $password==""){
$owner_email = $_POST["owner_email"];
$headers = 'From:' . $_POST["email"] . "\r\n" . 'Content-Type: text/plain; charset=UTF-8' . "\r\n";
$subject = 'Endless Flooring Quote Request';
try{
if(!mail($owner_email, $subject, $messageBody, $headers)){
throw new Exception('mail failed');
}else{
echo 'mail sent';
}
}catch(Exception $e){
echo $e->getMessage() ."\n";
}
}else{
require_once 'Mail.php';
$to = $_POST["owner_email"];
$subject = 'Endless Flooring Quote Request' . $_POST["name"];
$headers = array (
'From' => 'From:' . $_POST["email"] . "\r\n" . 'Content-Type: text/plain; charset=UTF-8' . "\r\n",
'To' => $to,
'Subject' => $subject);
$smtp = Mail::factory(
'smtp',
array (
'host' => $host,
'port' => $port,
'auth' => true,
'username' => $username,
'password' => $password));
$mail = $smtp->send($to, $headers, $messageBody);
try{
if(PEAR::isError($mail)){
echo $mail->getMessage();
}else{
echo 'mail sent';
}
}catch(Exception $mail){
echo $mail->getMessage() ."\n";
}
}
?>