User blog comment:DaNASCAT/Technical Update: August 8, 2016/@comment-5645428-20160810074313

Since an inline style sheet (#6) is used for the unique Special:AdminDashboard layout, Wikia.css stated rules of the same specificity are overruled. Although there are workarounds, I've noticed elements such as .WikiHeader that are present on every page are given additional rules for Special:AdminDashboard only (I don't know why this would be necessary). Classes common outside of Special:AdminDashboard should not have to be modified due to the differences on the one page. I suggest the rules are shifted to the main Qualaroo style sheet. By extension, that would apply for those of Special:ListUsers as well.