If your post was edited, you should change your password and enable two factor authentication. Editing posts is not something mods can do. Admins (Reddit employ

If your post was edited, you should change your password and enable two factor authentication. Editing posts is not something mods can do. Admins (Reddit employees) are able to do this, but it is an extremely serious action that raises red flags. If your post was edited to say "[Removed]" or "[Removed by Reddit]" that is a deletion, not an edit. [Disclaimer: used to work for Reddit]