Bookmarks issue: Amount of pages shown

I went to get review and trim the bookmarks I have and it displayed 13 pages and when I got to page 5, the number of pages stop there:





The only ways to go beyond page 5 and beyond are to go to page 4 or manually type the page number in the url string:






Not sure if this was an issue or intentional. Just wanted to get rid of old bookmarks. Didn't realize I became a bookmark hoarder/whore.