CloneDVD2 - Multiple same audio stream?

[beserk1]

I try to increase the quality of my backup by deselecting some of the audio stream from the Stream Preference menu, but as the screenshot I provided shows: under audio stream, there are 2 of the same stream name "Chinese Dolby AC-3/6". And when I uncheck "Dolby AC-3" on the right side, both of the stream will be check off.

Can I just select one of the "Chinese Dolby AC-3/6"?

Also, what is the different between Dolby AC-3/6 and DTS/6 audio stream?


Thanks