"In transit to Louisville" probably means that Louisville is its finally destination by plane on the select flight with stoppage in Anchorage. If it was going to Louisville non-stop straight from Hong Kong it would say "departure scan Louisville" instead.
no flight flies straight to louisville, it has to stop there to clear customs, a ups rep told me that would be the only possible delay besides weather etc, and since these are iPhones and I'm sure customs is busy looking at millions of these passing through there we shouldn't have a problem clearing. my phone is on that flight with you guys as well, does anyone know when the next flight is leaving from alaska to louisville?