Ji-N:
Could you please provide a screenshot of the issue? To add a show, you will need to add it from its page. The script is for sorting your watchlist.
I don't think there was any issue. I was checking her account when she posted the ticket. She thought she could add titles to her watchlist from the list page. Her list was empty, and she was hovering over the Title Header of the Currently Watching section. So she saw this
I think you can close the thread.