Completed sales would improve the picture, but I disagree that the 63-day figure is unusable without them. It can still indicate listing behaviour if the start date, removal date and treatment of relisted properties remain consistent. The useful question is whether July used the same method as...
What does “duplex” mean in each advert? That may be causing some of the floor-area inconsistency. One listing might give total building area while another gives only one unit or usable interior space. Ask what the stated figure includes.