I stopped playing after completing the F1 2019 Invitational Series. I enjoyed F1 so much I couldn't go back to non F1 cars.  So I've been gone a long time and much has changed. I won't even ask about the Principal and how he affects the game. That can wait.

What I do need help understanding though is the relationship between the max driver level needed on the Invitational screen vs the L5 driver level I do have on Vettel. 4 of 7 what? I just achieved 4/7 after scoring 13k driver XP points to move up to L5. 

I'm lost. Would someone please explain this relationship to me so I don't feel like such a dunce? Thanks!!