You got the first part right, 3 vs 4 is knock-out winner plays loser of 1 vs 2 (semi-final) Winner of 1 vs 2 goes straight to final
Placings on the ladder is determined by each teams "scores" , wins per loses.
In the event that two teams have even "scores", the highest "average" determines who goes on.
Example C grade KF2 proceeds as Fire's KAT's teams' average sucked

lmao!
AklDude