Yes, according to rust pattern it is in the front spring to frame mount. We did check torque on that as well
You may need to replace the bolt in the spring mount. Sounds like they could be stretched from being loose. Check the holes to make sure none are oblong.
Yes you can see the movement, it is coming from where the front spring hanger, looks like where the roll on front of spring has movement. dealer replace some of them still gets rust pattern to indicate that is where the movement is