When we last convened a fortnight ago we noted that The Chainsmokers' first full-length album, Memories... Do Not Open was No.1 in 40 territories, based on early iTunes tabulations. In the real world, where the survey period is a full week and physical sales and streams come into play, Memories... Do Not Open finally debuted atop the official charts only in the USA and Canada, but it still made a very impressive opening, with collated debut positions for the last ...