A control system (80), and the method of use thereof, for controlling the positioning of an adjustable deflector (62) employed to transition or redirect a flow of crop residue (B, C) from an axially arranged threshing or separating system of an agricultural combine (20) to and through a chopper assembly (24) and into a crop residue distribution system (26) for distributing the residue onto a field, and more particularly, to a control system that is responsive to changes in the amounts of crop residue being distributed by side-by-side spreader assemblies (52) of the crop residue distribution system to alter the positioning of the adjustable deflector (62) to change the flow of crop residue and to more closely balance and equalize the amounts of crop residue being distributed by the side-by-side spreader assemblies (52) of the crop residue distribution system.