@Dede0Yes, I declined the later-arrived booking request. Yes, the pre-approved earlier pre-approval request then booked the room.
In my experience, except in the very beginnings, more than 90% of all pre-approval requests that I approve lead to an actual booking.
I posted here because there is no way to contact airbnb in a fruitful manner, in the (probably unrealistic) hope, that someone of airbnb reads it and thinks about it.
I don't need to read thru the help system to see that a booking request blocks the dates even if I have NOT approved it. As stated in an earlier post, it seems logic to me that an "immediate booking" (don't know the corrrect word in english, I mean those that are automatically accepted) blocks the dates and thus makes only pre-approved but not booked requests impossible. That's fine and correct.
What is NOT correct is, that a booking request that I did not accept yet makes it impossible to book for a pre-approvel request that I accepted.
The correct process would be that the dates stay open until *I* accept a booking or a pre-approved one or an "immediate" one books. In the concrete case this would have given me the chance to ask the ones from the booking request for some details about themselves and wait some hours to give the pre-approved one the chance to do the booking.
I don't like to decline people just for not having a complete profile. Many new-to-airbnb people have meaningless profiles in the beginning. I can understand that because not everybody wants to put a lot of information on websites they don't really know yet.
So in these cases I'd like to ask for some information and then decide. It seems unacceptable to me that airbnb blocks the dates during this process thus making it impossible to book for the already pre-approved, and literally forcing me to decline such a request before I have the basis for the decision.