Differences in rates for guest and host

Hi everyone! This is Inés, from Argentina. I would like to ask for help on a very important issue: why does Booking publish a rate for guests with fees and taxes included and a different rate for hosts where those fees should be added? The difference between one price and the other generates quite annoying situations: on the one hand the anger of the customers, who when they arrive find that they have to pay more, or on the other the obligation to work below the costs for the hosts. Is there anything I´m doing wrong or didn´t I consider? Thank you for your help and advice