No Worries, it took me sometime to get it working fine. It really shouldn't be this hard but anyway.
I have all 4 channels working independently.
Try This
Traktor
Audio Device = ADJASIO
Output (keep as before)
Input
-Channel A L 1 in 1 R 2 in 2
-Channel B L 3 in 3 R 4 in 4
-Channel C L 5 in 5 R 6 in 6
-Channel D l 7 in 7 R 8 in 8