I guess they put him as early as possible as there the weather might turn bad later on. The earlier, the less chance on rain. I'm actually more surprised that Pogacar isn't going first of his team.
Puzzling indeed. Jumbo and INEOS' team hierarchy seems obvious OTOH, going by the start times
1 Roglic
2 Vingegaard
3 Van Aert
1 Martinez
2 Thomas
3 Ganna
4 Yates