for the quantity, you have:
<?php echo WA_eCart_DisplayMoney($eCart1, $eCart1->DisplayInfo("Quantity")); ?>
this should be:
<?php echo $eCart1->DisplayInfo("Quantity"); ?>
it looks like the order document is a file filed, you cant write a file to the email body.
in universal email, you can add the file field as an attachment on the attachments section.