Windows Folder not accepting file change

[boatbody]

Lately I've noticed when I pull a document off an on-line court system the file comes in PDF form to a client folder. I pull over two or three at a time. The documents show in the Windows folder, but if I want to change the name of the document to add a manual date, the documents accept the change and then revert back to their name without showing the change. If I back out of the FOLDER and call it right back up, then the name change shows. It hasn't been doing this except since perhaps the first of the year. Ideas as to what's going on?