Fixed the problem by changing the permalinks format back to default.
Thanks.
I just noticed that when you click on the post titles, it also goes to the google tracking page.
I was using the button in the visual editor, but I removed it after it also didn’t work.
As an experiment, I also just reversed the change I had made in the theme’s index.php file (the_excerpt->the_content), so now it is back to displaying the excerpts instead of full posts. However, the “read more” function is still broken, so now no one can read the full posts!
Changing it back to the_content…