That bracket is not in the frame of the first picture (impossible to see = impossible to compare). The picture you just attached is not taken at the same angle as the other two...which is why it appears to be more-tucked-in (the bracket is lower than the bumper, so as you the position/angle of the camera when taking pictures you'll get more bumper in front of the picture). I believe that bracket is one of several that hold the bumper in place (this one I think helps the shell line up correctly with the hood).
Generally speaking you're not going to be able to pick out wrecked-and-repaired vs. never-wrecked from pictures. I would suggest asking the seller, getting an inspection done, and then looking at the car in person if you want to find that out. Nit-picking pictures as you're doing is not going to be very productive...and you're going to get a lot of false positives for issues (you'll see differences/problems that aren't there) unless you start applying common sense to your review of these photos.