Redstone Output on Chiseled Bookshelfs Bugged - SOLVED

When you put in books in the Chiseled bookshelf, the signal does whatever it wants, not going in a certain order, and not staying consistent. 

 

Edit: Now it seems to most of the time go 1,2,3,6,5,4 down and up, but sometimes goes 1,2,3,4,5,6 up and then randomly down, or something else

https://www.dropbox.com/s/9yd6p7ntnxmmt7t/2023-06-07%2011-57-01.mp4?dl=0

 

Edit2: Nvm I see how it works now, it depends where u add/remove a book