Is the person that created the template automatically included in every project that ues that template?
By default, the person who creates the project will be set as the project’s owner. Because custom templates are originally projects, this is still the case. You can remove the creator as the Project Owner or from the Project all together but you’ll want to make sure a remaining Member has edit rights like shown below:
It is also good practice to make sure the creator or other members aren’t collaborators on tasks they shouldn’t be. The creator will likely be a collaborator on anything they built. They might not want to be a follower of all the tasks that are created from the template