Allegedly, on or about 14 June 2016, Ed Greshko sent:
Ideas of what I'm doing wrong OR a better place to ask this question.
Truly hard to say without any concrete examples. We can't tell if you've got a PHP mistake, a server configuration mistake, or it's your browser (e.g. does your page also rely on the browser doing something with JavaScript, or cookies, or an issue with caching).
My first thing would be to try simplifying the page, until it contains just the element you're working with.