But when looking at the screen shots provided the "Relay control - Clockwise M3" value is set to 3 and the "CCW M4" is also set to 3. Is this correct that the same signal is used for opposing directions?
No, it would send both CW and CCW signals to the drive at the same time.
However, most router users only use CW, and have no hardware wired for CCW. In that case, the Output 3 in the CCW field doesn't do anything.