Wrong tax amount reported to Google Analytics via the hikashopanalytics plugin

-- url of the page with the problem -- : www.saundersls.com
-- HikaShop version -- : 2.6.4
-- Joomla version -- : 3.6.5
-- PHP version -- : 5.6.30

It appears the tax amount calculation is incorrect with respect to what is reported to Google Analytics via the direct call method in the hikashopanalytics plugin. We are currently using version 2.6.4 (not 3.0.0), so I'll be downloading the new code to check to see if this was fixed in the latest version.

At line 372 in the hikashopanalytics.php file (v2.6.4) is: 'tt' => round($order->order_subtotal_no_vat + $order->order_shipping_tax + $order->order_discount_tax, 2),

Earlier at line 221 the tax amount is being calculated as: $tax = ($order->order_subtotal - $order->order_subtotal_no_vat) + $order->order_shipping_tax + $order->order_discount_tax + $order->order_payment_tax;

Is it possible this code at line 372 was missed in the 2.6.4 changes?

Thanks,
Paul Proffitt