comptrmedic,
I've never experienced such an issue. I'm using web server as in RC-Switch example.
There are, however, certain browser issues. For example, when using Chrome, I need to type command two times to get it working (I guess that is the way Chrome's cache is working). So when I need to use browser, I prefer Firefox over Chrome.
My best guess is that re-triggering happens because of browser's cache. Try using another browser, or turning off cache (note that this could also slow down your normal browsing). If that doesn't help, there may be something special about web server that is running on your Arduino.
ps. apart from browsers I use Tasker to for direct HTTP POST requests when I need to trigger a switch or change automation settings. I doesn't require to load/reload pages and works flawlessly.