[Fender0122]

Noticed the same thing when I changed mine. I think the frames under the lights are one use only. Seems like the clips are not holding the bumper as tight. I also noticed when I pulled my original one off, it warped the clip retainers on the bumper, as well. So if it's not that bad I wouldn't worry about it.

But if you do want to take it off, there's just a bunch of clips you pull with a flat head screwdriver and then there's those one-way snaps under the taillight that you have to just pull on (or find a more gingerly way of getting them off). Pulling the taillights beforehand wouldnt be a bad idea to prevent them from getting scratched.