problem with V-twin e-revo

Hi, we tried disconnecting the red wire from one of the ESC and it didnt make an improvement, it also meant that the ESCs werent synced as we had to urn both on individually. The ESCs LEDs seem to flash really randomly, not in sync when the throttle is pressed, is this normal. There the pics from the reciever box, with the Y lead and bits.

thanks
Ant