from how the wipe area looks, it seems that the BASE of the wiper is mounted at an angle on the window....
as if the right side is higher than the left side on the mounting hole....
What about unscrewing the assembly and putting a shaped washer under it to ensure the left side is a bit higher than the right (relatively) ????
just storm draining here..
(but what I would do is send that picture to another dealership/Ford and maybe the local paper that advertises for your Ford dealership
and ask them what they think ?)