Enabling "bind to layout" once again disables the scrolling. Is it just me, or is anyone else experiencing problems with the .cap I provided? For some reason it just won't scroll at 200% zoom unless I unbind the scrolling.
As PixelRebirth brought up it's not taking zoom into account for the layout binding. I know how to fix it, but I won't be able to get around to it for a while.
In the meantime, you can use uniform size grid scrolling to simulate proper binding. Just set the area size to the size of your window and set it to follow your player object and it should work fine. Also, make sure to keep layout binding off.