Currently, orders are being tracked by google analytics on the confirmation page. Challenge: when you click "confirm" you need to connect to a payment provider and for example if your card has insufficient funds the order will be tracked but not actually gone through.
Solution: Orders should only be tracked on the "finish"/success page - or even better: In the analytics tab in the sw6 admin, you should have a configuration that enables you to set the "location"/time when an order should be tracked acc. to your preference.

Value for merchant: More realistic/reliant feedback on actual order numbers.