ConvertXtoDVD 7 how to set it up correctly?

Question

DVD

Hi all. Maybe the topic is not very relevant, but your help is needed.
Sometimes you need to burn DVDs to DVDs for your father and grandfather, I use VSO ConvertXtoDVD.
Previously, I used the VSO version of ConvertXtoDVD 4 and 7-8 films interfered with my disc, but there were two drawbacks:
- a long conversion, it took more than an hour, although I set the maximum level of converting in the settings
- few settings in the menu
I recently switched to ConvertXtoDVD 7, I like everything here, everything is cool, fast conversion, a large selection of menus, but there is one drawback:
for some reason, I have 4-5 movies on the disk, if I don’t want to convert anymore, although after creating the image, the disk weighs 3725 MB, that is 800 MB is lost somewhere, although more than 5 files cannot fit.
Maybe you need to somehow configure ConvertXtoDVD 7 (to fit more movies)?
Or can you tell me something?)