It is easiest for me to explain by updating the code.
On confirm_cart.php on line 89-90 it looks like:
$WA_PP_ECO_Do_itemized[0][$nextIndex] = "Name" . strval($cartIndex+1) . "";
$WA_PP_ECO_Do_itemized[1][$nextIndex] = "".$eCart1->DisplayInfo("Name") ."";
It can be updated to:
$WA_PP_ECO_Do_itemized[0][$nextIndex] = "Name" . strval($cartIndex+1) . "";
$WA_PP_ECO_Do_itemized[1][$nextIndex] = "".$eCart1->DisplayInfo("Name") ." : ".$eCart1->DisplayInfo("options") ."";
Then the same thing on pp_confirm.php on lines 100-101:
$WA_PP_ECO_Do_itemized[0][$nextIndex] = "Name" . strval($cartIndex+1) . "";
$WA_PP_ECO_Do_itemized[1][$nextIndex] = "".$eCart1->DisplayInfo("Name") ."";
is updated to:
$WA_PP_ECO_Do_itemized[0][$nextIndex] = "Name" . strval($cartIndex+1) . "";
$WA_PP_ECO_Do_itemized[1][$nextIndex] = "".$eCart1->DisplayInfo("Name") ." : ".$eCart1->DisplayInfo("options") ."";