The "Edited by" message is automatic for me and there is no option to turn it off, but I don't have a problem with that. I do, however, have a problem with the links not turning underlined and blue immediately, although that probably can't be fixed. The only way to make a link work is to submit the post then edit the post and press the space bar or enter key after the URL. Have you noticed that there are "Edited by" messages on all the posts with links?