Read More button on latest posts stays on same page

Hi,

I found in the forum that the issue has been already found : https://wordpress.org/support/topic/read-more-buttons-below-posts-link-to-main-page/
But… it is tagged as “resolved” with version 2.7.2.

I’m using the version 2.7.3, but the bug is still running on my website.
@ohnagee seems to have the same issue (but writing his issue at the end of the “resolved” post)

Thank you in advance for your help.

The page I need help with: [log in to see the link]