I think the preferences you refer to may only affect the PayPal shopping cart, which has nothing to do with the E-junkie cart service. Anytime you see "cart" referred to in PayPal's site, they are most likely referring only to their own in-house cart service. Also, there may some data collected/provided from PayPal's end during checkout that is either not passed to or not recognized by our service, so you may find the missing information through your PayPal logs/emails instead of ours.