@Sean1135,
It is the way that Airbnb chooses to display totals in search results (and is common on other travel platforms, also). The nightly price includes the rate, cleaning fee and service fee, but does not include the taxes, and there is a small link to see price breakdown.

Click the link for the price breakdown, and it doesn't include the tax (maybe Airbnb only shows the amounts they and the host will keep).

The listing page will display the base nightly rate and any discounts, and the fee and tax details. The difference between the search results total and the listing page total is the amount of tax.

Booking.com
Search results page

Listing page

Price details page. Notice that the refundable deposit wasn't previously listed.
