Total is not correct if checkout day is book

There seems to be a glitch in the booking form automatically calculating the total price when the checkout day selected is already booked. If I select a span of days with the last day not booked, the total is correct. But if the checkout day is already booked as a checkin day for the next guest, it doesn’t add the final night to the total, even though that previous night is bookable and it allows the booking to be submitted. Even if I have a price on the day that as the checkout day, it doesn’t add in that final night.

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