As soon as I posted this I got it. I do most of my development inside a docker image that sets up watches for all of my source files. I customized the css framework I'm using so I had to have it set up where I've only checked in my override files and I have a script that installs the rest of the framework before compile.

I was compiling everything properly for the production release, but inside my devimage I need to run the install-style-dependencies task before starting rollup.

This means that the undesired styling that I wanted to fix is now showing on both dev and prod, but that just means I can now fix it in both. :)