I had to read it several times, but he's saying that when he uploads a file, it gets uploaded to the server, but the file does not actually change when he visits the website on his computer.
Possible reasons and fixes:
Reason: Your computer has a cache of your website and isn't getting the newest version of the page.
Fix: Try clearing your temporary internet files. If you don't know how to do this, ask and I'm sure many others here will be willing to assist.
Reason: You could be uploading to the wrong directory.
Fix: My own hosting company has two directories. One is named "www" and the other is named "html_files" and if I upload to the "www" directory, it will instantly get replaced by the backups in "html_files." Thus, I need to upload the files to "html_files" in order for the system to properly replace the files on the server. If you are not sure which folder you should be uploading to, most companies have a customer support you may contact for help, or if they have one, check the FAQ.
-- There was one more I wanted to mention, but now I forgot. Oops.