previous / older entries

I’m having problems with my blog https://www.gnomeangel.com

The homepage is fine; at the bottom of the page is the Older Entries link. But when I go back to /page/2/ there’s a problem. In addition to the Older (and Newer) Entries link, there’s a link to Previous Page (and Newer Page)… and the link is not correct. Instead of taking me back to /page/3/ this Previous Page link takes me to my index page.

I have searched the code for this Previous Page link, but cannot find it anywhere.

How can I go about removing this incorrect Previous Page link if I cannot find it? Where would it be, and why is it appearing?

Changing my theme to a WordPress default does not help.