Just checked the outdated Lionel shipping schedule (I think it's dated Nov 6, 2011 as the number at the top of the list is 201106).
Not sure if you were joking or not. Since there is no day/year/month or month/year/day formats being used, or used very little, that format is a fairly common year/month/day, or 2020 Nov 06. This is standard in China and other Asian countries. So that shipping schedule, while still old and out of date, isn't 10 years old.
Way back when I would monitor the shipping schedules of the different manufacturers but since they were always wrong (optimistic) I just stopped worrying about it. Just enjoy running the trains you have and (hopefully) your pre-orders will show up before you die.
As far as the Preamble Express is concerned, since other items with this style passenger car have been delivered, I wonder if the issue is the E8.