Take the camera you used for the pics, and set it on top of the iPad. Does the image displayed on the camera look like the image of your iPad? Ordinary cameras will not render an accurate image. I took a pic of my keyboard after seeing your keyboard, and the camera display and actual keyboard look different. These screens do not have a 100% uniform screen, but the ones I've seen are as close as I'll need.
Look for problems, and you will find something.
Look for problems, and you will find something.