Editor Button showing on frontend

An editor button is showing on the frontend at the right of each blog entry. I have disallowed all functions except commenting and subscriptions for the public but the edit button allows a viewer to archive or delete any entry. Having searched through the forum I see this was an issue with a user back in June but I am not technically savvy enough to put the fix you described there (an amendment to the template.css or something like that.). I checked the public permissions on my joomla site and the public do not have permission to edit. Please can you help.