looking the waue_confirm_2.php page, i see that you have the CC and BCC set. However, i'm not sure why you have the first and the last name in the fields. Try setting the CC and BCC to go be just the email address.
//BCC Entries
$WA_MailObject = WAUE_AddBCC($WA_MailObject,"".((isset($_SESSION["eCartCheckoutForm_email"]))?$_SESSION["eCartCheckoutForm_email"]:"") ."");
//CC Entries
$WA_MailObject = WAUE_AddCC($WA_MailObject,"".((isset($_SESSION["eCartCheckoutForm_email"]))?$_SESSION["eCartCheckoutForm_email"]:"") ."");
or you could do it through the UI.
let me know if you are still having any issue.