Hi Branka & Silvia,
You may want to contact Airbnb. In the past week I have had the wrong amount showing on my listing, a guest double-booking and the site not showing the ability to make a special offer so I think they are having problems with their website. With the double booking, I have my calendar set up to block the day before and the day after a reservation so I can prepare. When I looked at my calendar, 7 of the upcoming bookings did not have the day blocked, the rest were fine so something is definitely wrong.If you send them an email they should get back to you with a solution.
I think they are too busy concentrating on getting more hosts and guests that they have lost sight of keeping the site running smoothly.