Hi, Carol,
To fix this problem, first remove the logo and any page numbers in the header throughout your document. When there is no content at all remaining in the header, go to the first page and tick the box for Different first page. If the box is already checked, UN-check it and check it again. Now enter your logo. It should only appear on the first page.
Does that resolve it for you?
Jo S.
Google Docs/Drive forum volunteer
not a Google employee