I have a new black caviar Jumbo (haven't used it yet) and I noticed that the corner of the "flap" part curve outward, so that it doesn't lie flat against the bag when closed. I don't see this happening with my medium/large flap, so I was wondering if it's a defect. Can I fix it on my own? Would they exchange this for me? I know it's a small thing, but it's kind of bugging me. Thanks!