Search page pagination linking back to home page

I have a site with a search bar in my navigation menu, and also on my home page. When a user searches for something, it loads fine and shows pagination if there are enough results. But when they click a page number it takes them back to the home page (which ahs no blog posts listed on it at all).

Im sot sure if I have done something wrong or not, or if its to do with a setting?

Thanks.