We're working on updating the FAQ about the bleed area. Basically since you're looking at the back of the case, it's hard to visualize the fact that the case wraps around the sides of the phone and has a slight lip around the front. The image printing process does cover that entire area. We wanted to make people aware that the image does in fact need to cover more area than is visible in the configurator. You do have the option to not cover the bleed, it will just end up being the white base color of the case.
Thanks for the feedback, it's much appreciated!