Please verify that the input banks within the Card Out tab (in ROUTING) are set to Local 1-8, Local 9-16, Local 17-24, Local 25-32.
If you're recording 32 channels simultaneously, you can set Aux 1-4 inputs to Card 1-4, meaning Adobe Audition's outputs 1-4 will show up on Aux channels 1-4. This is found under ROUTING / Home Tab.
To have Audition's tracks feed the individual channels-
Press the ROUTING button & stay on the Home tab. Change each Channel Input bank from Local to Card 1-8, Card 9-16, Card 17-24, Card 25-32. In Audition, you'll then route each mono track to each discrete output.
Hop this helps!