Once you have created a form template or made changes to a form template, you will need to Save Draft and Deploy / Publish Template so that they are available when you next use the form.
Additionally, when you edit a form template, you will need to Save Draft and Deploy / Publish Template before the changes to the form will appear when creating a new one. (Note: These changes will only apply to newly created forms after the template has been deployed, they will not automatically apply to already saved/submitted forms.)