Subtitles in DVD to iphone converter software


I’m using Aiseesoft’s DVD to iPhone Converter (version 6.2.62). I own the Game of Thrones DVDs and would like to watch them on my phone; however, if I select No Subtitle, then I don’t get any of the subtitles where they should be (when other languages are being spoken on the show). But if I select English subtitles, then I get them for the entire episode.

Is there a way to put subtitles only where they should be and not for the whole episode?

Unrelated - is there a difference other than file size between converting to MP4 and H.264?

Any information would be much appreciated - thanks!