We were really disappointed with the stay, probably the first time it's happened with Airbnb. We were 6 people, but couldn't even 'check out' two separate cards. So every time someone returned to the flat, we had to sign out another card. We were then locked out of the house on the last day after going to get a coffee.
Worst of all, we paid an extra 40 euros (on top of the already expensive fee) for late check out, and then at 10am we were woken up anyway.