Hi there,
I have another problem with test my application.
On the website I have two scrolles as you can see in the picture: 
How scroll only scroll marked with an arrow ?
I think we could use javascript to perform the scroll. Since java script takes an element (div) as an input, so the scrolling should be perform for the scroll matching with the div.
I also used scroll to view function to reach the element instead of using vertical/horizontal scrolling.