Thanks nikitarama and apologies if I was unclear.
Okay, these are two different pages which are tracking two different kinds of events and have different 3rd party pixels firing as well. That's why there are two different DTM properties.
One of the pages is a movie page, and the other page, which is iframed onto the movie page, is a ticketing page where user can search for times and movie theaters. So, the page load rule that's not firing is on the ticketing page which is iframed onto the movie page. Make sense?
When a user clicks on a "Get Tickets" button it activates the iframe. Once the frame is activated I can see all the relevant values for the ticketing page firing. But when I look for it on the Network portion of the dev console it's not firing there so nothing is actually being sent to adobe analytics.
EDIT: I should also add that both are published and live. They are also built by two different developers who are different vendors who work for the company I work for.