There is bug within the printer pooling functionality. If the queues that are participating in the pool are set to B&W then load balancing does not occur the way it should.

 

When the queues are set to color load balancing works as expected.

 

As of yet there is no descision as to whether this will either be a hot fix for the current 8.2 version or rolled into the next release which is well along in its development.