HessAcademyAnswered on November 17, 2020 08:27 AM
Sam_GAnswered on November 17, 2020 09:55 AM
Thank you for contacting Support.
One possible reason is that when the user reloads the submission page, it triggers another submission which causes a duplicate.
What I would suggest you try is the unique submission feature https://www.jotform.com/help/64-How-to-Set-Unique-Submissions-on-a-Form.
Let us know if you need further assistance.