Does it show in JS status yet? Was it built before Jan 9th or can you tell?
I haven't contacted with dealer yet, so I don't know the exactly code details.
As I know, assigned estimated ship date is not shipment date, actually it's estimated build date, the production will start in 24-48 hours from that date, for example, my estimated ship date is Jan 23rd, and build sheet shows up from today, which means it's being built or been built, so my van start build after Jan 23rd. You need to know the estimated ship date, then you can calculate the approximate production date.