I just noticed that my 2010 Edge is lower on the passenger side, looking from the rear, by about 1 inch. The car is parked in my garage. I'm using a line on the rear bumper as a reference point. I've got about 10K  on the car.  I do have some things stored in the spare tire area, fairly well distributed and I don't think that they would weight that much to drop the spring(?) by an inch.  I guess I did notice this before, but didn't think anything of it until today. 
Should I be concerned about this or is it within accepted limits? I would hate to sit around at the dealers for a minor thing...  Thanks.