Based on my personal expertise and experience with AirBNB, let me try to help.
Airbnb does not cache anything in regards of your search criteria. Your browser does. So clear your browser cache and try again. If this does not help, make sure your browser is up to date. Furthermore, I can guarantee that everything works well in Chrome latest version.
If you have open listing, that you sometimes manage, and preview - that listing will get cached and displayed on first location. If you wish to see more realistic standing of your listing, clear browser cache and try again. Careful tho, you may loose some important cached data if you rely on your browser saving searched data.