Issues with Array Position Formula from Clay Team: Video Guides Included

I'm having issues using the Array Position formula provided by the Clay team - more details in this Loom: https://www.loom.com/share/6c8b7bf9edd24efabfcdeea8b0d93898 here's the video guide I received for numbering rows: https://www.loom.com/share/42c7f8be9bbd4ca69165e01d6377dd01?sid=f0234a49-0e17-4ae6-ac96-799aa40d53eb Link to Clay table: https://app.clay.com/workspaces/354814/workbooks/wb_yminVz8MSaiB/tables/t_Ytki9s879ZBb/views/gv_vKGRmkqyXGgi