Inserting jaws properly can be a bear. Double check the numbers to see if they were put in the right slots by the factory. You won't hurt anything taking them out and reinserting then trying again. I have a three jaw that lines up properly when I insert the jaws only about once in twenty tries. (BTW, a three-jaw is no way designed for using with wood.) If you can't get it right, do consider sending back to Grizzly.
"Folks is funny critters."
Think for yourselves and let others enjoy the privilege to do so, too. ~Voltaire