Even though they might appear contradictory on the surface, I don't think the two ideas have to be. I think most people would agree that behaviorism and mere outward conformity to rules is not the goal of education. But, at the same time, lawlessness is no object, either. Charlotte Mason's ideas about habits sometimes seem to me to lean closer to behaviorism than I'm comfortable with, but at the same time, she is aware of their limitations.
I encountered the exact same idea in Comenius's Great Didactic--the idea that until a child has both the desire and the strength of will to choose to do good, habits are the means of keeping on the desired path, even if you haven't "arrived" yet.
It's not so much that the ideas are contradictory, I don't think, as that the speakers were discussing/emphasizing one part of a greater whole.