I know you’ve done quite a bit of analysis of some of these flags in commercial discs, Valeyard, but it turns out to be quite simple to set up seamless branching with the right software.
You can do the same yourself. I looked at Blade Runner, Alien 3, T2 Skynet, and they all look identical. And you can compare to even more discs with the menus - they always start with “1” for the c value of the first entry and then “5” for all other entries, no exceptions, & “In Time” is always 11.650 seconds (branching is done in the same way to seamlessly looping menus). Changing those settings in BDEdit shouldn’t be difficult or cause any problems for the disc.
The seamless flag is set correctly and even in BDEdit the c value for the first entry (the crawl) is set to 1 (non seamless) and the second entry (main movie) is set to 5 (Seamless), just like in the retail discs.
I don’t know why the in time is at 10 minutes (though I do see that in BDEDit), there is no indication of that anywhere in the software, all start times are set to 00:00:00:000 in the properties window and these settings are read only. I can try changing the in time in BDEdit, but I really don’t see what effect that has on anything, it’s not like the movie doesn’t start until the 10 minute mark.
Also, you said the teaser scan wasn’t included, but it is, along with the other two trailers that were included with 1.0, or am I misunderstanding?