This book was studied 3 times during congregation book studies. The first 2 times I was very young & don't remember shit, just some pictures which I thought were cool. I was a teenager when the book was studied for the 3rd time. It was then that the book was revised
The problem was that for some reason, our cong did not have an adequate supply of the new books for some time, so many had to use their old books. To make sure that those who had the old books were kept up to date with the changes, there was a pdf file that was made available which contained all the revised parts. Those who still did not have the new book had to make printouts to be able to follow along correctly during the study
I saw the many pages of changes & wondered to myself WHY there were so many understandings which needed to be updated??? However, I was still too brainwashed to figure things out, only was able to do so much later