if you have a disc left, you might be able to get a good burn with the other method I described. (dvd decrypter and Imgburn with anydvd in background)
DL media tests have been decidedly skewed towards verbatim discs as the accepted standard for "quality"
that doesn't mean you can't get a perfectly good burn out of a different media ID though.
i'm just hesitant to use clonedvd for DL burning (even though it can be done) since it's a transcoder...why use a transcoder for a 1:1 backup.
if you're removing items from the backup then you're messing with the layer break on the disc. clonedvd, by definition as a transcoder, cannot retain the original layer break. It inserts its own, and often does so very nicely, but the original layer break is obviously optimal so my view is why mess with it?
clonecd or the dvdd/imgburn method i describe both retain your original layer break. this may be a major contributing factor to your problem since your large spike in errors is almost exclusively at the layer break.
none of the above is meant to diss clonedvd at all. i use it for 100% of my SL backups. you have to admit though that the fact that elby included 1:1 dvd backup in clonecd is an admission that clonedvd2 might not be the best choice (or at least not the only choice) for successful DL burning.
there are a ton of people who use clonedvd2 for DL burning with no problems. I've had problems.
it would be nice to have a one-stop shop for all of your decryption, backup, burning needs, but that one program doesn't exist...although the entire package from slysoft (clonedvd2, anydvd, clonedvd mobile, and clonecd) are about as close as you can get to this ideal!