eCart Shipping Upgrade Options

I have setup shipping options based on Quantity of product in shopping cart for standard shipping based on Country in Checkout.

USA First Class $5.00 for first item then $1 for each additional item
International $7.00 for first item then $1 for each additional item

I would like to add option on shopping cart page to upgrade USA to Priority (+$2.00) or Overnight (+$7.50)

I followed the instructions on an earlier post (12-07-2009, 01:23 AM david331670) and created form fields on the cart page with check boxes to add an upgrade for either priority or overnight shipping, added hidden fields on the confirm page and added shipping options in the eCart.

No price increase is added if upgrade selected on cart page.

Attached are the cart, confirm pages and eCart1_PHP.php
Work in progress website : www.johnpripheritagecollection.com/
It is not currently attached to its PayPal account as don't want to risk the wrong shipping being calculated. Sales tax to RI customers only.

What am I missing?

thanks