I have a new Blank Site with Publishing enabled. I create a document library called UIResources. When created, the URL is /Lsits/UIResources1. This is the first list I have created on this site. What is causing this to happen? Is there anything I can do to fix it? I ran a check from Powershell to see what lists (hidden or not) exist on the site. This is the only instance of a UIResources doc lib.
Could you try changing the library's url to UIResiources.
For changing url of a document library see this post