">" next page link jumps to a wrong location

For example, in the demo, on the home [Jekyll Gitbook](https://sighingnow.github.io/jekyll-gitbook/) page, clicking ">" takes you to the last page, [About others](https://sighingnow.github.io/jekyll-gitbook/others/about/) rather than the actual next page, [Why Jekyll with GitBook](https://sighingnow.github.io/jekyll-gitbook/jekyll/2019-04-27-why.html).