Yesterday I did a run following the (Racer Any% Route) guide that one can find at ''Resource''. After 11th Race, the 12th doesnt seem to be unlocked to me, so I chose my own route.

After the random race, I tried to follow back the path to no avail. At this point I have all the races in Gold, which idk why it doesnt work with me.

So I continued choosing the random path until I get to finish the ''Seacrest Tour'', which ended my speedrun at point mark ( around 4 hours 50 mins), and it is almost TWICE as long as Speedbooster27's run.. I have no idea why..

Sadly I dont have the proof of the time because I fat fingered the ''skip split'' hotkey of Livesplit and ended up having a false time..

So my questions would be :

1. What is the condition for one to unlock the ''Seacrest Tour''?
2. Does the order of race events affects the unlocking of the final level? If yes, what do I do if the race event that we should follow is not unlocked??
3. In the photo, there were some numbers that were highlighted. What does the highlighted numbers mean??
4. Is there any possible time save? (like I did this run expect it to be just 3.5 hours long)
5. May I know what are the best cars for each Series?

I will post more questions if I have more uncertainty in this forum. Thanks in advance :3

Edit : I just figured out why certain number of my events aren't unlocked, it is because I chose the uppermost available event instead of choosing the available ones below it. Number 2 is solved.