I am glad that your days in Barcelona ultimately with a good taste of mouth that is the objective, but still I would like to indicate the points that mention.
The tourist rate of Barcelona is indicated in my profile in House Rules, you can check it yourself. And also, I sent a confirmation message of the reservation where I mention the pending payment to be paid in cash on arrival with Daniel. It is the only payment that AIRBNB authorizes to make in cash, leaving the rules of your community.
On the other hand, the data of your passport are data that are used for police control and are requested in any legal accommodation with tourist license.
For you Daniel the guy who made his check in and my legal assistant, is a stranger, but only is the person who was to open the doors and keys to my apartment which also has a lot of value.
Daniel had no problem picking them up manually, to the negative. They have been the only guests, of my 8 apartments in Barcelona that took that attitude.
In reference to late check in, Daniel did not intend to charge the amount as they anticipated the time Pretendian at the beginning. After having to stay almost 1h in his welcome, he decided to send it to the solution center.
I'm gratified that the end.. It is what counts and your stay in the apartment was what they mention. Receive a cordial greeting.