Hasn't CHAdeMO been in use in Japan for something like the past ten years? One would think they'd have worked out the kinks by now.
If the "standard" hasn't been defined incredibly precisely, then there's room for interpretation.
It's been used with just one car - the Nissan Leaf. Any chargers that have been built we designed to work with whatever peculiarities that car has.
I've had plenty of experience with inadequatly defined interfaces. They are the rule rather than the exception.