From this screen shot it looks like you have some pretty severe Horizontal linearity issues on the left side of the screen.
The "through the scope" shot here should be perfectly round, it's egg shaped with the point to the left of the screen, I also noticed all the credits were cut off on that side too.
As has been mentioned, it may just be a shortcoming of the sets design.
Is it adjustable so the stretch is equal on both sides? If you can do that you may then be able to reduce the width to bring it into a circle.
Oddly enough it doesn't look as bad with the test pattern.
