My dvd backup has the angle symbol displayed on screen for the first 2 chapters. I can't get rid of it by using the angle button on the remote.

Looking at the main movie ifo in ifoedit, sure enough the first 2 chapters list angle 1 and 2. This is clearly erroneous since selecting either angle doesn't change the picture and doesn't remove the symbol from the screen. Is there a way I could use ifoedit or some other app to solve this problem?