Suggestion -- when u update the data book, I personally think it would be easier for you to update it it in the original post in the first page, and then bump the thread to let people know it's updated. It enables you to see all the entries without having to scroll around and change pages. Seems better to me, but do with this suggestion what you will :/
This would totally depend upon the size of the databook tho. If it increases the set word limit then ofc further entries need a new post. But I guess the original post can hold around 15 or 20 OCs... or even more maybe, so it ain't gonna be a problem.. hopefully.