iphone - UIScrollView Pagination on rotation -

I have a UIScViewView view with some sub-views, on the rotation I see the size again and all looks correct, the problem is That whenever I rotate I've seen everything changed correctly, my scrollview is between two pages.

A single touch on ScrollAV aligns everything properly, what am I doing wrong?

This content can be set with a set of offset manually:

  [scrollView setContentOffset: CGPointMake (0, 0) Animated: Yes];