I recently applied a code to Wikia.js on Nitrome Wiki and its two sister wikis Nitrome Pixel Love Wiki and Nitrome Fanfiction Wiki to add a small module to the right rail above the search bar that contained links to the two other wikis. I also wanted to use Wikia.css on all three wikis to style the boxes.
Since I was modifying it from another wiki, I tweaked it on my own test wiki, and it worked fine from there. But when I applied it to the Nitrome Wikis, I started to have issues. The code on Nitrome Pixel Love Wiki works the way I want it to (example of the right rail here). The JS works fine on Nitrome Wiki, but the CSS was completely ignored, so I had to put styling within the template I used for the module. The exact same codes on the Fanfiction Wiki, however, do not work at all. I checked its Wikia.js and it seems there is a User account notifications script that prevents the siderail code from working. (I tried removing the User accounts script and the template showed up on the siderail.)
Is it possible for the two scripts to run concurrently so that there is no need to pick and choose? And why does the CSS not work on Nitrome Wiki, even when the exact codes are copied across all wikis and they work perfectly fine for the Pixel Love one?