It was pointed out that when a client made a error like username exist, the advertisers signup page reloaded without packageid info, causing them to start over.
If you experience this error find line 421 in /clients/advertisers.php:
$packageid = $_GET["packageid"];and replace with:
$packageid = $_GET["packageid"];
if(isset($packageid)){
$packageid = $packageid;}
else{
$packageid = $_POST["packageid"];}
Line 432 change to:
<input type="hidden" name="packageid" value="<?php echo $packageid ;?>">
Probably a better way of doing it, let me know, but this works.