I'm using Nintex Workflow 2013, Version: 126.96.36.199 - English. I have the issue, that I get the notification mail, that an item has been created many times. The workflow is based on a user defined site content type. I have the same issue in every list, that I created using this user defined site content type. At the beginning I didn't have the problem.
Do you have an idea for the issue?