Bands of color after converting

After ripping, converting PAL to NTSC, and burning, when I play the backup DVD on a standalone player, I get two wide bands of green superimposed over the picture. The top one is wider than the bottom. The picture and sound are fine, except for these superimposed areas of green. Is there anything I can do to eliminate this? The video is fine on my computer’s DVD drive. I have a feeling it has something to do with my method of conversion from PAL to NTSC.

Thank you