Chief Delphi - Vex SquareBot- movement programming problem

Hi, I'm programming the Vex SquareBot in MPLAB IDE, and am having some problems programming the movement since one of the motors on the SquareBot is inverted. I tried this code:

Code:

void normal_operation()

{

        int R_Joy_Up    = 127;                // These hold the joystick values.

        int L_Joy_Up    = 127;                // Only R_Joy_Up & L_Joy_Up are used in tank mode.

        int R_Joy_Down  = 127;                // This probably isn't really needed, to be cleaned up after project completed.

        int L_Joy_Down  = 127;

        int R_Joy_Right = 127;

        int L_Joy_Right = 127;

        int R_Joy_Left  = 127;

        int L_Joy_Left  = 127;

        

        int temp;

        

        while(autonomous != 255)

        {

                R_Joy_Up = GetRxInput( 1,2 );

                L_Joy_Up = GetRxInput( 1,3 );

                

                if(L_Joy_Up > NEUTRAL)

                {

                        temp = L_Joy_Up - 127;

                        L_Joy_Up = NEUTRAL - temp;

                }

                else if(L_Joy_Up < NEUTRAL)

                {

                        temp = L_Joy_Up - 127;

                        L_Joy_Up = NEUTRAL - temp;

                        if(L_Joy_Up <= 0)

                        {

                                L_Joy_Up = 253;

                        }

                }



                autonomous = GetRxInput(1,5);

                drive ( R_Joy_Up, L_Joy_Up );

                PrintToScreen ( "L_Joy_Up: %d\n" , (int)L_Joy_Up );

                Wait(1);

        }

My code works fine, until I move the left joystick on the vex controller all the way to the bottom. The the motor suddenly reverses direction :(

Does anyone have any suggestions? I really appreciate the help :)

Thanks,
Nathan