When I create a new bookmark folder, the name of an existing folder is frequently changed to the anme of the new one, why?

Frequently when I create a new bookmark folder the name of an already existing unrelated folder is also changed to the same name as the new one being created. Sometimes if I am creating the new folder in "Bookmarks Menu" the existing folder who's name is changed is also in the "Bookmarks Menu". But sometimes it will be in the "Bookmarks Toolbar". This is quite frustrating since the purpose of naming them is to identify them.