Sales report shows total before coupon is applied

-- HikaShop version -- : 2.6.3
-- Joomla version -- : 3.6.4
-- PHP version -- : 5.6
-- Browser(s) name and version -- : Firefox
-- Error-message(debug-mod must be tuned on) -- : Sales report shows total before coupon is applied.

When creating a table report for a sales total number for a period of time, how can we see the sales with coupons applied? Currently, the sales total includes order amounts before a coupon has been applied so it doesn't match the money that changed hands.

On the flip side, Orders listing reports show the correct order total after the coupon was applied.