The confirm cart page is a cart display page that shows before you confirm the order, confirm page sends the order to paypal.
the store order summary and details will not be added to either of those pages, it will be added o the pp_confirm page, after the order is passed to paypal, paypal redirects back yo your site, the pp_confim page processes the transaction, then stores the order information if successful and redirects to the success or failure page based on the transaction status.