Just wondering have there been any books removed from this quest recently?

I noticed that I've read 4 from this quest and got excited thinking that I only needed to read one to get the bronze badge, only Pagebound is saying that I've already got it.

I saw a post on a different quest where a book had been added accidentally to the quest & removed and that was why a few people were shown as having completed the quest with one book short & I was wondering if that was the same case here? It's no issue, I just wanted to make sure it's not a glitch or bug that I need to report.

(Will also be trying to prioritise one of these reads to make sure I've earnt the badge earnestly!)