Using Safari 6.0.2 om OS 10.7.5

I am visiting a newspaper site. When I click on a link to an article I read and then go back to the start page (using either the back button or finger swipe), but this doesn't bring me back to the start page but to the newspaper's start page from a few days ago.

I tried to reset Safari but that didn't work.

Haven't found any other pages where it happens.

Doesn't do it in Firefox.