99.9% of people having this problem have also forgotten promotions or genius discounts on their OTAs such as Booking.com, Expedia or AirBnB.
Check if you currently have certain promotions set on the sales channel, if a special package is active for you, or if the reservation was entered before you made the price change.
How did a reservation get confirmed for a lower amount than it is set in OTA Sync?
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