A family of Microsoft word processing software products for creating web, email, and print documents.
It sounds like you are probably using File>Open and opening the template, rather than using File>New and then selecting the template as the basis of the document that you want to create.
An easy way to do that is to add the New Document or Template command to the Quick Access Tool bar as it will take you directly to the Templates folder in which you can selecte the template with the result that a new document will be created from it, which will trigger the running of the AutoNew macro in the template.