putting file after revision doesn't replace old version on server

If I edit and save the local version of a file and the use the Put icon to send the file to the remote server, it appears to go through the motions of sending the file to the host server. However, the old version on the remote server is not getting replaced by the new version and I am not presented with any dialogue telling me that the file already exists and asking me what to do. Is that caused by some setting I have wrong in Dreamweaver or should I contact the hosting site? The only workaround I've found is to go into File Manager on the remote cPanel and delete the old version of the file I've updated. Then, when I Put the new version, it gets saved correctly. This is a pain to do for every file I update, so I'd appreciate some guidance. Thanks.