Has anyone else noticed that each of the four corners on the kevlar back of the Droid Maxx appear to have wear marks? It almost looks like paint has rubbed off or something. At first, when I took the case off my phone after two months, I thought the case was too tight and had caused wear marks on the four back corners. But then I took the phone into the store to complain about the case and the representative told me that all Maxx kevlar backs appear to be worn on the four corners. It's just the way they're made. Can anyone confirm whether the rep was correct?