I have the same problem, except i do uncheck the subtitle/subpicture boxes before going to the next page.
Everytime i've used this i've made sure that on every part of the DVD i want to rip, the subtitles boxes are all unticked. But still, when they are finished they have subtitles!

I don't know how to get rid of them.

Unfortunately now, ive ripped Desperate Housewives series one, all with subtitles, its quite annoying!

Also, when they dont have english subtitles, they have other languages (i dont know which one) But all the episodes have english subtitles, whereas the behind the scenes interviews and such have foreigh language subtitles.
But i know i unchecked the boxes, because ive done it everytime i use the software.