O.K........that is a very long answer. But I will try.
USUALLY , most years , it is an ALL EASTERN TEAM , EAST SEMI FINAL and EAST FINAL. The same thing in the WEST.
This year : The WESTERN team [SASK.]
had a better won/loss record , than the 3rd place team in the EAST [OTTAWA]
So , SASK. [the west team] , who had won more games than the 3rd place team in the EAST , gets to cross over , to the EAST and play the EAST's , 2nd place team as a reward for having a better season record!
In the CFL 3 teams make the play offs ,
3 from the EAST [game 1... is the east semi final [today] , game 2 is the east final , next SUNDAY!
3 from the WEST [game 1...today... is the WEST semi final , game 2 is the WWESTERN final , next SUNDAY]