@Cristan2
I do not see that you selected to use the Airbnb 20% discount for first 3 bookings on your listing? This is something you select (or not) when creating the listing. A new listing will show a callout when a guest attempts to book if the 20% new listing promotion applies. It looks like this:

Your Listing Callout looks like this and usually means the Host has manually lowered the price:

It does appear you have selected some other discounts though like Early Bird/Last Minute or other Discounts, have manually lowered your prices, or are using Professional Tools and a Rule Set to lower your prices. New listings typically can't add a Custom Promotion for at least 30-60 days as Custom Promotions need to look back 60days to get an average price.
Calendar Discounts
On your Calendar, go to Pricing Tab top right
View More Discounts to see if you have anything set there

Mulitple Discounts - Order of Application
https://www.airbnb.com/resources/hosting-homes/a/combining-discounts-and-rule-sets-694
