I have the pro board with 4 steppers running. If you are running the23-305-DS8 steppers then I would advise you to check your wiring especially on the 2 not working. From your discription the motors are coming on but your wires are crossed. My sheet shows White as small b and Green as large B. This could also be the problem with the one operating in one direction.
A word of advise. When changing connections make sure your power is off and that big cap is drained down to zero volts. If not you could blow your expensive driver chips. Been there and done it, believe me it was a new board.