I had a customer make a purchase and came back payment error! I read alot of post but found nothing. I am using the new prestashop 1.4 and it came with paypal 2.4 the error is that they overpay, but the difference is the shipping cost. so i checked states and countries everything looks good and paypal is : Payments by PayPal account (PayPal Option+) so it goes to there site to finish check out plz help