The issue could be because you have multiple questions of the same type: Constituent Registration Information (CRI). You should only have one CRI question, which can be configured to ask for all of the registration information that you need. You should be able to include all registration fields that are necessary in one CRI question.

When you include multiple CRI questions, it will create a duplicate for each CRI question that you have. For example, if you have 3 separate CRI questions for first name, last name and email address, then 3 records will be created from that survey.