So I finally got to talk with Mrs. Squirrel about this
@ZRacer83. Specifically about the 'different compound' idea that we had on FB. Now, again, she works for Continental and not Hankook, so things might be different there. When I brought up the 'alternate compound' being used for whatever reason (rubber shortage, etc) she told me that (as I already knew) on ETOs (experimental tire orders), yes, that can and does happen for various reasons. Typically very similar compounds, though, so wear characteristics would be nearly the same. However, on an OE tire that was built for and is going to a manufacturer (which is likely the case here) that 'no variations' are allowed. Again, different company, but I'd guess that Ford has similar policies across all their tire manufacturers.
Her best guess based on the information provided? Possibly a bad tire run on your batch of tires. It's obviously not a usual circumstance, but it can happen.