Cannot change edits on my Reading List 2

Hi. I know there are rules in adding items to the list, which you can't have more than 100 items. However, I was able to add them when I go to that page containing the front comic book cover. I would like to delete a double image for Teen Titans: Future's End. I deleted the image, but the message says you can't have more than 100 items. I also tried removing the second page, since the first page can only have 100 items. But the message says, your list is empty. I would be glad if someone can delete the double image for me. If can't, then I'll leave the way as it is. Thanks.

Never mind. I've deleted Reading List 2, which contained 100 items. So I had to create Reading List 2 again. Now that I can't edit changes due to more than 100 items, I'll create another reading list.