How are your floors marked? B 1 2 1 2 3 etc. Assumed that you have a jumper on the learn pins, yes?? The A and B lights are blinking when you run, they are so fat that you see them as on constantly.. you could try swapping the encoder leads. The unit may be thinking it is running down when going up. When you are at the third landing, Is the directional engaged? It should not be touching the cam..