Question about chapter release numbering, Ishida’s trajectory

I took a break from CX for a little while and came back to consider the chapter numbering. While officially speaking, we’re only at chapter 59, going by entry, there have been about 200 or so releases total including “split” chapters like 40, 40-1, 40-2, 40-3, 40-4, 40-5 and so on, each of these sub-entries being a pretty sizable release and not at all reading like a cut-up chapter he releases a few pages of at a time, but (typically) a self-contained chapter with a trajectory, beginning, middle, and end to each entry.

It’s not like the later D. Gray-man releases where some chapters would just be eight pages and kinda just float there, nor is it like some Chainsawman chapters where the serial weekly format weakness compared to being able to read a full volume (it feels like you watched 30 seconds of a fight scene an action movie).

My question is this—what is the purpose of this ordering? With the benefit of Ishida being entirely on his own schedule, I would assume that the whole-number chapter entries are made to indicate an overall outline, maybe a percentage. Are the chapter numbers more a set pacing device for Ishida and will the series end at chapter 100 or the like?