The problem you are describing is common with some types of DVD protections. For simplicity, Ripit doesn't provide a movie only (without extras) option, which would generally allow a 1:1 rip of just the movie. Fortunately, there are other programs out there that do.
You can report a problem using the help menu in your ripit program. It will ask for detailed DVD information that they can use to develop a fix through a future update.