Now that would make sense! Signing him for 2 years guaranteed?! Not so sure! If this is true its a good move. You give the guy a chance and remove that interim tag so player will look at him as a coach but you are also keeping you options open. Who knows, for all we know Smart could be the next Phil Jackson or he could be next Kenny Who!
If its a guaranteed deal, it just makes no sense. Then again, neither do many moves made by this organization recently.