Footer links to index pages: neither slash nor hashtag works

https://www.mela.co.nz/

Thanks for looking! — this is my first Squarespace site.

On this site I created a footer link, "We Give a Damn" that goes to a page inside an Index (under Secondary Navigation).

At first I used the inbuilt link browser to allocate the slug to that page, "/giving-a-damn" was the slug.

But when linked to, that page did not display normally -- the banner background was cropped, and it displayed as a single page rather than scrolling in context with the other pages under that Index.

So I dug deep into Squarespace help and found another way to link to a page using a hashtag instead of a slash, "#giving-a-damn" is my current slug.

The only problem with this is it will only work from the footer under that Index. It doesn't link from the footers of other pages or Indexes in the site.

I'm happy to show the back end of this with you if you give me an email address to allow permission.

Have you tried disabling Ajax and setting the link to be /#giving-a-damn ?