It looks like you forgot to add a user name with the other connection information in the previous post...
But it looks like it is set to always use ground...
Update line 426 of confirm.php from:
$Shipping_Parameters["CarrierCode"] = "03";
to:
$Shipping_Parameters["CarrierCode"] = "".((isset($_SESSION["eCartCheckoutForm_UPS_Service"]))?$_SESSION["eCartCheckoutForm_UPS_Service"]:"03") ."";
Then it should be using the shipping type selected on the previous page.