Summary
bookingkit always distinguishes between booking date and performance date when displaying revenues.
Booking Date = When did the customer make the purchase?
Performance Date = When do I need to provide the service for which I've already been paid?
Regarding the dashboard statistics, we present orders paid with vouchers in this way because it allows us to provide an overview of the total booking volume.
In other words, vouchers are displayed "twice," once as a voucher and once as revenue for the booking. If we were to record these revenues only on the day of voucher purchase in the statistics, orders completely paid with a voucher would show a revenue of €0 on that day (which would be the same as if you, as a provider, offered a 100% discount and thus a free booking. This would be misleading, so we chose this method of representation).
In the Statistics, revenue is also displayed based on the booking date.
In the Calendar, all prices are displayed based on the performance date.
By the way: discounts, such as those generated by promotional vouchers are correctly accounted for in all areas.