your talking about the movie only right.
well if you ripped the movie in dvd decrypter before u used dvd2one
your problem might be u didnt select the widescreen title set.
Usually (not always) the full screen title set is before the widescreen title set. which mean if u open up dvd decrypter select file mode its defaulted to select the movie vobs and ifo.
and if u have 2 different formats (widescreen and full) in 2 different title sets it will automatically pick beginning movie title set.
if thats the case look for another set of vobs that are as big as the others that dvd decryter automatically picks and rip those dont forget the ifo to that particular title set...