Yup, we are in the same boat. Two replaced seals (updated version) and one complete PTU because they discovered a chip in the seal face on the original PTU. One would have figured the new PTU would have the issue solved but within a couple months (cold weather) it was leakin again. They suspect the new PTU had the old style seal in it.
The wait now is till the middle of January for a back ordered seal.
Almost makes me think the problem may be related to the axel shaft diameter or line up instead of the seals but i am no Ford engineer.
The very best thing about this is the service dept at my dealership. They have bent over backwards to make sure we have a vehicle to drive while ours is sitting waiting.
Other than the crappy 18" rims (corrosion on the outer lip) that they replaced,
Air cond. that smells now and then ( just need to be carefull about turning it off and blowing out the vents before stopping) ( not really exceptable), and takes forever to cool down, we have enjoyed our purchase.
No vehicle is going to be perfect!!! (extended warranty, extended warranty, extended warranty!!!)
A 3000km holiday thru the Oregon/Washington/B.C. mountains had us at about 10.5ltrs/100km average in our Limited AWD loaded with 4 adults and gear.