Have you tried the DVD on another machine? It's always best to do that with any suspect DVD, just to make sure it isn't a player problem. I didn't notice that on my copy, so it might be a production problem.
Also, advice for the future - alot of us experience the same problems as you - floaters, damaged discs, missing discs, etc. I've started to open the DVD when I got in my car and inspect the discs and the packaging. If something's not right, you can go right back in and make a return. That might work well for you in the future
Welcome to the forum!