We have worked it out to be a day off given to the housemates. Apparently in an earlier episode it was even mentioned that there was an off day with no planned activities. (Probably Sunday or something like that?)Was there ever a reason given by a housemate on social media since last night on why the ninth episode ended on Day 20, but episode 10 started on Day 22? We've mysteriously lost an entire day - if the onscreen day count on the episode is correct.