I believe that I’ve got my blog settings set so that I have Content/No Sidebar. Yet, on a number of my posts, the Archives and Search boxes are appearing in my sidebar. I can’t figure out how to get rid of them.
in Customizer > Layout > Sidebars you have the option to change the site wide settings.
So check there first to see it they are disabled globally – if they are then this can be overwritten by either of these two modules: