Which TSI are you using?
Are you not maybe in 4 deck mode or something? the little black knobs on the top right should be turned all the way to the left.
i am using tsi file 5.1.
How do I get off of deck c and deck d mode?
Not sure with the mapping you are using…but you can click in the drop down box on the top right of the screen that says 2 deck int …4 deck external…etc.
Select 2 decks internal