Hi,
Ok, I see what you mean.
Well, it's not really a bug. When you select "sales" under the "specific options" area, it gives you the total amount of the sales for the products.
When you select instead "orders", it gives you the quantity. As an added bonus, on the displayed listing, we also display the total amount as we can easily have it, but it's not the focus in such case. That's why it's not included in the CSV export. But we could of course add it to the CSV, it's just a matter of changing a bit the code.
We'll add that for the next version of HikaShop.
If you want to do it before then, you can change the code:
$widget->exportFields=array('order_product_name', 'Total');
to:
$widget->exportFields=array('order_product_name', 'Total');
}elseif($widget->widget_params->product_data=='orders'){
$widget->exportFields=array('order_product_name', 'quantity', 'Total');
in the file administrator/components/com_hikashop/classes/widget.php