Hi @Rachel_O ,

Have you released form in to the wild or are you testing with a small group?  It sounds like a situation we had where people answered first few questions during test but didn't submit.  When they reopened the form it picked up from where they had got to.  But if you had edited anything in the mean time that could get quite confused.  If it is that the solution is to get them to a point where they can submit by entering dummy data and then delete their response.  Hope you sort it.