Changing the price is a glitchy part of the website. Change it, save it, close the browser, reopen and check. If not working, try going to the place where you block dates as not available. Change the price there to your highest (peak season or weekend price) for a long way into future (like a year) then go back to the normal change price location and rechange it to reflect weekday pricing and other things like that. Eventually your change will take. Works better from a PC than a phone. It is possible that which browser you choose will influence it also.