2 things:
First, as Ise has alluded, in unpowered conditions, the rotor system has to switch rotors for yaw input (or else the yaw behaviour would reverse for the pilot), so when watching the helo on the ground unpowered, it is correct if the reaction is reversed.
Second, how do you measure blade AoA? Are you aware that coning/flapping has a big impact on the individual blade AoA? I'm afraid that visual perceptions might be misleading in this case.