Why is the nightly rate wrong on Tripadvisor?

Each channel controls how the Rates/Fees/Taxes are displayed. 

• TripAdvisor.com bakes their guest booking fee into the listing price. 
• Flipkey shows the correct listing price, but on the quote, they will show the guest booking charge on a separate line item.

To learn more about TripAdvisor's guest booking fee, see https://rentalsupport.tripadvisor.com/articles/FAQ/noc-What-is-the-booking-fee.