Board Game Arena

When we had a demo of this game from the publisher at UK Games Expo the other week, they said explicitly you can only claim one house from each spot.

How does one claim two houses from the same spot?

I've just played a game where my objectives required me to collect six houses... but there were only five available on the board. My opponent only needed four, so I was automatically at a 5 point (minimum) disadvantage as I had to choose which objective to not complete.