IMPROVE. RadPageView - in ExplorerBar mode, add a method which will scroll the item into view and the item will be on the top on the control. Currently, the ScrollToItem method, scrolls to the item and whenever it finds it the scrolling is stopped. 
Alternatively, add a method which will ensure that the item and its content are is visible.

Resolution: 
Add the ScrollToControl method. Please take a look at the following code snippet how to use it: 
RadPageViewExplorerBarElement view = radPageView1.ViewElement as RadPageViewExplorerBarElement;            
view.ScrollToControl(control);