Let me see if I understand your issue.
When you target an unordered list in CSS the style you specify is applied on all unordered lists.
/* applied on all unordered lists */
In order to style a particular unordered list, you can apply a class on it and style the element by targeting the class instead of the more general element.
What you need to keep in mind is
include the class declaration in the HTML
Target the class by using its name preceded by a dot
/* style applied to only the elements of class navigation-bar*/
Hope this is somehow related to what you were searching.