This happen because each price for products is rounded before send it to Paypal but the $products_amount used to find delta and discount is computed from addition of products prices not rounded.
So in some case the $products_amount is not equal to real addition of products this cause a false delta and add a fake product "discount" to compense where is not needed. And the total of products is not equal to order amount.
gillesbourgeat
commented
8 years ago
This happen because each price for products is rounded before send it to Paypal but the $products_amount used to find delta and discount is computed from addition of products prices not rounded. So in some case the $products_amount is not equal to real addition of products this cause a false delta and add a fake product "discount" to compense where is not needed. And the total of products is not equal to order amount.