The local word is that Haslem gave Hue an unconditional, iron-clad promise of a three year deal. The reason is because they were firing people every year, and no one would take the job. So Haslem had to promise. And because he is such a noble, trustworthy, ethical guy, he could never, ever go back on his word.
Still, why couldn't this work out? It's not like it's never been done to bring in a new GM and leave the old coach in place for a year. Hmmm....where do I recall that happening before?