Hello. I was helping a friend merge two WordPress blogs by importing one into the other. When I did this it created two "about us" pages. I deleted the old one and the new one's URL is .../about-2/. I went in to edit the page URL. I changed it to .../about/ but when i click the blue "update" button it changes the URL back to /about-2/. I've never had WordPress do this with permalinks on posts. Is there a reason why it's doing this with pages?