Found it, took my only a couple seconds to fix after it took me a week or two to look at it.
I set up a plugin for my page to integrate the .php file I use as a footer. I named it footer in vbulletin, when it's called it was $footer.
Changing it to $ECJ5_footer eliminated the issue. Guessing that I somehow inadvertently used the same name you did or something along those lines?