Some pages on my site are pulled from cache

Many hosts are employing proxy servers and/or your clients browser may cache content too often.  All pages within the Geo software are created dynamically each time they are accessed and many of the pages that may have the same url will have completely different content within them.  This is because there are different pieces of data to create each page and not all are passed to the script through the url.  So there are times where clients will see content or transaction information that comes from a cached page.  If the problems reported by your clients are caused by browser caching the following meta tags will most likely correct the problem:

must-revalidate" CONTENT="NO-CACHE">

The "expires" meta date just needs to be set in the past to make sure the browser (and proxy server) goes to get fresh content.