Does anyone else find that the Apple Smart Cover doesn't fit "perfectly" over the Mini? What I mean by that is that the smart cover alone slides around and doesn't fit perfectly and securely over the Mini. I noticed that it's due to the extra material that's between the magnet and where the smart cover starts. When combined with the silicone case the it's a perfect fit, but it feels like the Smart Cover was made to go perfectly wth the Silicone Case. Has this happened to anyone else? I hope that his makes sense. Thanks for reading.