Thanks for your review/feedbacks Yael and I have given you a nice review.
I have 5 listings in Airbnb currently, 2 apartments and 3 rooms. For the apartments, they are not in the same building/condo and the one you had booked and stayed was a cheaper one.
As for the rooms, they are in the same building/house and their prices were cheaper than our apartments.
As you know, the apartment is not cheaper than room for staying in Singapore and I hope that I have clarified your doubts in this message. However, if you still have any doubts, pls contact Airbnb for further clarification.