Editing one page changes others? Newspaper theme using tagdive live editor

Hi there,
I’ve got a page set up fine at https://development.bstreetdigital.com/boxingindex/weight-classes/
I’ve made another page (WordPress Pages > Add new page) at https://development.bstreetdigital.com/boxingindex/locales/

However, you can see that the majority of the page at locales is filled with content from weight-class
This was all there already. If I delete it from /locales it is removed from weight-class.
If I add anything in /locales it appears in weight-class

It’s like there is a Page template that I’m editing rather than individual Pages.

I’ve tried editing the page by i) going to it directly whilst logged in and clicking Edit with Tagdiv composer at the top and ii) from the wordpress/Pages > edit with tagdiv composer and iii) wordpress/pages/edit then edit with tag div

in all cases it acts like a template rather than an individual page.

Any ideas?

Best

Kyle

i think I fixed it. I had somehow put the whole of the /weight class page into the Header template. So it was being inserted into all new pages!