To whomever can see this, I'm the one scanlating this series right now. I've seen the volume 1 table of contents, and the numbering is about to get really messed up haha. So far, the numbering between the author's twitter compilation and the volume were the same. However, we are entering a section in which the actual content of the chapters in the book are different from the ones on twitter, but both of them have the same numbers. I'm gonna differentiate between these two by sticking to the volume chapter numbers, and using the twitter numbering when the chapter isn't in the volume. What this means is, if numbers skip or have weird half numbers, chapters aren't missing!! It just means it's not in Volume 1.
If later on, volume 2 gets released, I'll go back and update the numbering according to their official order.