First off, if what you are using will not back up your DVD submit the necessary info to the author of the program you are using via email, website or the proper forum wherever it might be so an update can be made to the program.
If you want to know what works on your problem DVD post the name of the DVD, the country and region code and whether it is Widescreen or Full Screen and the mode you want to back it up in. For example movie only, full backup, ISO or movie and menu.
Responders if the program/version and mode you use is already posted please don't post it again.
IMO this should serve to find out what backs up what DVD and the OP wants to know.