We've all had the same problem recently with CloneDvd 2 & few batches of discs.
I now rip the movie with Clone, (remembering to un-check the delete files after sucessful burn option).
Then use Nero to create a DVD-Video.
(drag the contents of "C:\CloneDVDTemp\VIDEO_TS" into the red video_ts folder).
Nero will quite happily burn 3 copies simultaneously if the fancy takes you,
(now that's gotta save me some time)
You'll never go back.