I'm guessing you already fixed this problem with previous comments. An alternate to the PWM splitting in hardware is to map it in software. This can make life easier for your mechanical/electrical teams because they just plug each motor into a PWM slot and then you write the same value out multiple times in each software iteration:
Code:
init:
motor1 = Talon(0);
motor2 = Talon(1);
loop:
desiredMotor = 250;
motor1.Set(desiredMotor);
motor2.Set(desiredMotor);