UIScrollView scrolling automatically by 64 points

I'm adding a UIScrollView to a UIViewControllers view. For some reason, between adding the scroll view to the view and it getting displayed, the contentOffset is set to {0, -64}, 64 being the status bar's 20 plus the navigation bar's 44 points (I guess). Below is some code that reproduces the issue, and an image.

How do I prevent iOS from setting the contentOffset?

- (void)viewDidLoad
{
    [super viewDidLoad];

    _scroll = [[UIScrollView alloc] initWithFrame:CGRectMake(10, 100, 100, 100)];
    _scroll.backgroundColor = [UIColor greenColor];
    _scroll.delegate = self;

    UIView *red = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 10, 10)];
    red.backgroundColor = [UIColor redColor];
    [_scroll addSubview:red];

    [self.view addSubview:_scroll];
}

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];

    // outputs {0, -64}
    NSLog(@"%@", NSStringFromCGPoint(_scroll.contentOffset));
}