Yeah, I see what you're talking about. Basically how its sticking up off the surface of the trunk, right? Mine is stuck with the 3M tape, which usually makes the spoiler look like its raised up a bit, but over time it's flattened down to look completely perfect. I doubt anybody really notices it because it blends so well with the lines of the car.
So I took this picture tonight when I went out.. back when I thought it was that the spoiler wasn't reaching to the edges. As you can see, mine doesn't either. Hope the glass guy can take care of it for you! Oh, sorry for the picture quality. It was so dark outside I had to hold my friend's phone up to the spoiler so I could get enough light because my phone's flash was too bright!