Villager Trade Displays As Unbreaking 2 But Trades a Bookshelf

Pretty much just as the summary says. I Have been rerolling for an unbreaking 3 trade for 4 hours straight and have broken + placed 1,400 lecterns. NO unbreaking 3 trades, and hardly any unbreaking 1 or 2 either. I finally got an unbreaking 2 trade and decided to settle for that, but when I clicked on the trade, it displayed as trading a bookshelf instead of the unbreaking 2 book. In the screenshot, I have clicked on the enchanted book, and the trade is actually for a bookshelf.