You might want to sit down at this point.
This is the mark of the beast Did you use the disc yet ? If so you might be doomed to "burn" in hell
But seriously - are ALL DVDs in your batch like that ? I have seen this regular occurance on genuine TY CD-Rs and they burn perfectly. If they are ALL like that and you are concerned, return them / exchange it......Otherwise if you can't be bothered, burn and check your disc.