Content shows lower in UIScrollView when app first opened

I have my content in a UIView embedded in a UIScrollView showing lower than it should when I first open the view.

However, when I then click on any of the textfields, it scrolls up...

And returns exactly to the place where it is supposed to be

This is the code I am using:

- (void)keyboardWasShown:(NSNotification*)aNotification
{

    self.info = [aNotification userInfo];
    CGSize kbSize = [[self.info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;

    UIEdgeInsets contentInsets = UIEdgeInsetsMake(0.0, 0.0, kbSize.height, 0.0);
    self.scrollView.contentInset = contentInsets;
    self.scrollView.scrollIndicatorInsets = contentInsets;

    // If active text field is hidden by keyboard, scroll it so it's visible
    // Your app might not need or want this behavior.
    CGRect aRect = self.scrollView.frame;

    aRect.size.height -= kbSize.height;
    CGPoint origin = self.activeField.frame.origin;
    origin.y -= self.scrollView.contentOffset.y;
    //origin.y += activeField.frame.size.height;

    if (!CGRectContainsPoint(aRect, origin) ) {
        CGPoint scrollPoint = CGPointMake(0.0, self.activeField.frame.origin.y + self.activeField.frame.size.height - aRect.size.height);
        [self.scrollView setContentOffset:scrollPoint animated:YES];
    }

}

Works fine for iPad (landscape) but not for iPhone (portrait). Any ideas?

Thanks a lot!