You can't go back directly to the specific page or list you were reviewing (ie:opened, nor opened, etc) and the browser back button takes you back to the report page or the main contacts page. Why isn't there a go back button?
Thank you for passing along this feedback. When you are looking at the reports, are you looking at the screen that has this on the left side of the page? If so you can always click on one of these categories and view the contacts.