Books duplication bug with Chiseled Bookshelf

When a Chiseled Bookshelf is full of books , if you right click on it with an other book , another will appear by stacking on the first and this number can go beyond 64 and it works with all books including those that are enchanted which makes this bug extremely dangerous. Please fix it.
And if you don't believe in me check out that video : https://www.youtube.com/watch?v=r92CzS-XWEo

Begin at 1:17min

 

ShadowFenix2