Elite Champion achievement?

Are there any special requirements not shown for these achievements?
I have all check marks in the Breakout Championship ( 1500/1500 ) and all showcases { 300/300 ) . I did not complete this all at once, I moved on and came back when an applicable car unlocked .
I did do 1 series on the super easy assist thing, could that affect it? Or I’m I just missing something. Thanks

You have to beat the forza cup, then they add mpre races and showcases to all the different divisions for you to go back and complete. Then you will get the elite achievement