What you're experiencing isn't all that uncommon, though its persistence through the steps you've taken to clear it up is.
As we've discussed before, your internet browser - be it Internet Explorer, Firefox, Opera or any of the others - typically keeps what's called a 'cache' of recently downloaded files.
On an aside, "CTRL F5" will tell the browser (at the least Firefox and IE) to re-download the current page entirely from the internet without using the cache.
This provides a way to fix some webpage issues without needing to completely clear and thus loose all your other information stored in the cache.
The classic example is the image that is the logo at the top of every page of Ask Leo! Your browser will download it once and then keep it in the cache so that on each page that uses the exact same logo the browser doesn't need to download it again, it can simply use what's in the cache.
Now if I change the logo, say I update it with a new one, then the browser is supposed to notice that the image is newer than what it has, and update/replace the copy in its cache.Every once and a while after I visit a website (such as and NASDAQ.com) when I go back to it old information comes up on the website. The only thing that solves the problem is running defrag, but only temporarily, as soon the issue will reoccur. The fact that defragging has an impact is completely mysterious.For instance, I went to a week ago and now every time I go the scores, news stories, stats, etc. Certain pieces of info on the website are current and sometimes clicking a link will bring up current info, but most is old. Let's look at what happens under the hood, what steps we would normally take to clear it up, and then make some guesses as to what else you might try.Many web hosts provide online editing tools to help you make changes to your site.You will be given a login username and password which you use to access a special web page.(Gotta love those not-so-technical terms.) In essence, that check for "is there something newer than what I have in my cache" fails, or the attempt to download and replace what's in the cache fails.