Odd one, this. I've had this (minor) issue since, I dunno, iOS 7? When I buy a new app, or get a new free app, the default download location is on the second (last) page screen rather than my home screen, even though there is space on my home screen for new apps. And today a new app I downloaded showed up in an existing folder. What's the logic behind where new downloaded apps show up? I'd like mine to turn up on the home screen!