@Susan5380,
I looked at your profile, and see that your caravan is a new listing. Did you agree to the 20% new listing discount when you were creating the listing? It's usually a question posed right before you make the listing live.
You can check what types of discounts that are associated with the listing by clicking the calendar icon on the listing's dashboard, select Pricing and scroll down to the discounts section. Note that if you selected a non-refundable cancellation, it provides a 10% discount for bookings made within 60 days of arrival, but it's not listed in the discount area.