I had the same problem, needed new saddles as the nut had come off of the back but not the front and the sway bar 'straightened' out the saddle for me. So when the new ones came in I bought new nuts from the dealer - very cheap- and put locktite on them. It's been 9mo or so and not another problem... except for the damn squeeking....
Oh, and a thumbs up on their service! Always very attentive when I called.