1)  The first page offset by 11 pixels at location (11,0) or
 2)  The second page offset by 19 pixels at location (301,0) or
 3)  The second page offset by 65 pixels at location (255,0) or
 4)  The first page offset by 81 pixels at location (81,0) or...

UITabBarController -> UITableView -> UIViewController containing UIScrollView

A)  scrollViewDidScroll to get called multiple times when UIScrollView first loads?
 B)  why scrollViewDidScroll would end on offsets that are not multiples of 320?
 C)  is the problem that UITableView contains a UIScrollView and so when transitioning
     from UITableVIew to UIScrollView some parameters in the UITableView are being
     used by the UIScrollView?

[self.scrollView addSubview:controller.view];