No, you do not.
In fact, think of the template as a folder to hold the editions. Templates have a consistent design theme among every uploaded edition.
When you upload a PDF to a template, you set design themes that carry through to every edition uploaded under that template folder.
If you would like a different design theme for an edition, you will create a new template. For example, if you create a template called Spring, then you will create a template called Winter.
But, if you are uploading content without a set theme that can keep the same aesthetic as the original template, there is no need to create multiple templates. You only need to create one template with a design theme. Then, upload all editions under that template.