form not loading new data

I have a website that populates and displays an adobe form. If a user loads a form (in any browser), closes the form, corrects the record, then displays the form again, Adobe shows the form with the old data. I can see that the form has been updated by looking at the form directly on the web server. However, what the user sees is not the most recent version. In some situations, I can delete the form from the web server and the person will still get the old form. The only thing I can think of is that Adobe is holding the old form in cache, but I am unable to find a setting to disable this and have been told adobe doesn’t cache anything. What could possibly be the issue here?