Both 'Submit Data' buttons submit the same form. That's why you get that duplicate email. When you press Submit on Enrich Name, it submit first part of the form to. Make them in separate forms.

<?php
$s=array('AAA','BBB','CCC','DDD','EEE','FFF','GGG','HHH','III','JJJ','KKKK','...','ZZZ'); $nr=count($s);
if (isset($_POST['posted'])) {
if (isset($_POST['ONE']))
{
...