Jeff,
I noticed that from the rear, the skirt seems to be lower than the reflector lamps about that same amount. You aren't talking about that instead are you?
After I left the dealership, I thought maybe it was left with a gap for cleaning(those who have rust nightmares

) but then i looked at the photos and it hit me that it's tacked on to a plastic bumper anyhow, so that wouldn't be it.
Looks as if it was to go up on the bumper higherto line with the reflectors and pull it up and out further with the scoop that appears on non-skirted models.
Some photos of US models look tight.