@Miriam785
Multiple discounts are complicated, as discounts can been set on different places (listing calender, rulesets or even both) and sometimes generate unpredictable results. It always advised to simulate a booking on your own listing to check if the calculated price is as expected.
The Help articles say:
- rulesets always precedes.
- only one discount is applied
- lenght-of-stay discount precedes over early-bird-discount
https://www.airbnb.com/help/article/2061
https://www.airbnb.com/resources/hosting-homes/a/combining-discounts-and-rule-sets-694