Hasselblad H and Quantum flash

[MarkKay]

I was taking some shots today with my Hasselblad H2/Leaf back and used a quantum t5d flash with a quantum D module.  When i use the qTTL mode in fill or primary light mode, the exposures are pretty close and decent. However, when i used the auto or auto fill mode as fill or primary light, I am getting +2 stops or more over exposure.  I am not sure if anyone else has had similar issues or not.