Your site is not running SSL-all-the-time (i.e. both HTTP_SERVER and HTTPS_SERVER for the storefront 'should' reference
https://www.KaleidoscopeGalaxy.com) and the current versions of Zen Cart require that the contact_us page be accessed via SSL. You're probably seeing a silent redirect on that form's submission to the non-SSL version of the page.
Make sure that the site's got a valid SSL certificate and then update the /includes/configure.php (remember that it's going to be marked as read-only!) and the /admin/includes/configure.php files to reflect that (a) SSL is being used on the storefront and (b) both the HTTP[_CATALOG]_SERVER and HTTPS[_CATALOG]_SERVER settings both 'identify' as https.
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