I tried DVD Shrink 3.2 and it couldn't copy the copies. I tried to copy the same discs with DVD Clone and the reading stopped with errors (Data Error (cyclic redudency check)).
I also tried to open the disc files and just copy the video folder and although I think it should have worked it didn't. I got the same type of error.
I tested a DVD copy that I tried to copy with VSO Inspector and it reported Good 100%.
At this point I suspect that my burner burns well but reads poorly. It's a Liteon 811s. I am using the firmware that was the first one released with the ability to make all discs ROM.
So, I get great copies from originals but can't copy copies.