These scanlations are pretty unimpressive, and they feel pretty short. Without going to a Japanese raw site and comparing page numbers I have no way of knowing if this is in fact complete. I am more than happy to see somebody change the chapter numbering with real proof.
This is how it was originally supplied. I looked through the pages and couldn't find any logical chapter markings, so I'm not sure there are any. Either that, or the volume numberings are wrong (wouldn't surprise me!)