Upload shows new version briefly then reverts to old one

Hi there,
I'm trying to update a page on my website but even though FTP shows the right size of file transmitted it shows the new version briefly then reverts back to the older version. I've used the overwrite option and uploaded directly or with drag and drop but just the same result. I cannot find anything obviously wrong and my server is of no help at all,
David

I'm having the same problem as well, on 2 different computers no less. I had uploaded all the new files and everything appeared to be fine until i pulled it up in a browser and noticed a mismatch of old and new files. Now when I upload OR download and the file already exists, I hit Overwrite and the file is unchanged. Glad to see I'm not alone in this strange ordeal.