Could somebody explain me some stuff ? ._.

[OHL]

The advantage of superrally (whatever starting order rules are) is that your team can repair the car all night long, while normal competitors have only a few minutes for checks and adjustments.

Actually, the teams have a fixed service time of 3 hours to repair the car and the car must be placed into parc ferme 4 hours before the start of the next day's leg. So, in some case it may not be possible to get the full 3 hours.

46.2 has the time penalties for missing a stage
47.1 & 47.2 have the service time allowed and technical requirements to restart.

Regarding road order for Sunday, the order is P1 drivers in reverse classification order from the day before. The crews that run Rally 2 will start after the others. Hence why Neuville was first on the road again. Unlike what ESTR has written, the rule has been like this for many years.
45.2 covers this area.

All regulations for these kind of things can be found here if you're interested: FIA Sporting Regulations