I noticed that on my wish list there are several that are duplicated. I would like to remove one of them but can't seem to figure out how to do so. Any suggestions? thanks

Check the little box that is to the left of the book you want to delete on your wish list.  Then click on the button that says delete in the top right-hand corner.   Just make sure you check the right books--once a book is deleted, if you try to add it back, you will go to the end of the line.

I don't believe that the system will allow you to put (exactly) duplicate books on the wish list. What you probably have is different editions of the same title. This increases or speeds up your chance of getting a wish list book. With variations such as hardcover v paperback and different years there may be up tp 10 or 15 editiond of the same title.

So if you really want the book maybe you shouldn't delete the other editions. As Robin said once you delete them they're gone and if you relist you go to the end of the line.

.