A family of Microsoft word processing software products for creating web, email, and print documents.
Nothing you put in a header can be in different places on different pages, and that includes watermarks.
Make an AutoText entry of your logo, stored in the Normal.dotm template (or in the template that your document is based on, if that's a different one). When you type the name of the AutoText entry and press Enter, the logo will be inserted in place of the name.