Hi, I’m Wes. I’ll be glad to help with the issue and answer any questions.
Since the design is different for your template, the most effective way to get this done is to copy and paste the header into a brand new Word document and then "tick" the first page header options and copy the original template header and footer and paste into the new document.
Right, I have tried that: it seems to work. Thank you very much. If the problem recurs, I suppose your advice is simply to re-create the template from scratch in the same way through a new document.