Difficult to support a version of LS that is 3,5 years old.
But what are your settings for "response persistence"?
www.limesurvey.org/manual/Participant_settings
If this is off, the questionnaire correctly should start empty.
However, what makes me thinking:
Well, one participant send the survey without all questions answered,
So this sounds to me, that she did not fill the questionnaire, but sent it empty. Then of course, there is nothing to show for Limesurvey.
Could you explain a little bit more? Sounds weird.