LG VX-8300

Ok, I'm on my 3rd 8300 for various reasons, and on the first one I noticed that on the inside, along the right side next to the keys close to the edge there were scratches. I couldn't figure out how I scratched it there of all places. Anyway, had to return for a different reason and next one did the same thing, and also the 3rd now. Do the two pieces rub together or something? Is it just me? Can everyone please check your phone and let me know if yours did this too? Thank you.