Its not and I would assume youre just really REALLY overthinking how it works
As said every round (so lev vs c9 is round 1, envy vs c9 is round 2, g2 vs c9 is round 3) it inverts
C9 played 2 more rounds before falling to the lowers
If you invert something twice you end up with the original, non inverted, value (or side of the bracket here)
-> had c9 lost to envy they would have ended up on the top half of the lower bracket
Just approach double (or tripple in this case, but the part youre looking at is just double) elim as the most basic format imaginable. Thats sorta its whole reason for existing.
Before a single team even plays you can clearly define where in the bracket the winner and the loser will go to (as opposed to something like swiss for example)