On line 59 of paypal-confirm.php you have:
$WA_PP_ECO_Do_itemized[1][$nextIndex] = "".$DinkyCart->DisplayInfo("Price") ."";
It looks like it should be:
$WA_PP_ECO_Do_itemized[1][$nextIndex] = "".$DinkyCart->DisplayInfo("TotalOptionPrice") ."";
To account for options that have an associated charge.