If you're seeing duplicate transactions from your recurring template, it may be that you have two or more templates created for the same customer. These templates could be named differently.
To check for the duplicate template:
From the left menu, select Reports.
In the Name field, select the customer's name.
Select Run report.
Notice that each item listed is a separate template for the customer. If you see a duplicate template, make note of the template name. To delete the duplicate template:
Select the Gear icon on the Toolbar.
Under Lists, select Recurring Transactions.
Now you know how to handle duplicate transactions form your recurring template.