DVD Flick Audio Sync.

I like to use DVD Flick to merge (identical) mpeg2 files from episode disks because it will optionally author the disk without encoding;however the audio is often out of sync.
I found that if I opt to 'Ignore audio delay' the problem is gone.

1 Highlight the Title and 'Edit title..'
2 Highlight the audio track.
3 'Edit'.
4 Check the box to ignore the audio delay and 5, Accept.