I am not a browser expert but this sounds plausible. The browser cache is designed to prevent having to download content locally each time a page is opened. Each time a page is opened a check is made to see if the cache already contains elements of it. If it has, it uses that local version. With the RH Server application as the cached version is local the statistics are not being updated because the page is not being viewed from the server.
It may be an idea to set your browser options to delete the history every time it is closed. Also be aware that it is possible that different browsers may have slightly different options.