To hopefully clear up the ambiguity, "may be only split if x" does not mean "must remain split in all cases", neither on its face nor by implication. There is no rule preventing recombination of these kinds of publisher-split web chapters. In fact, in many cases it's preferred though not required, for fairly obvious reasons.
We don't consider this as arbitrary combining in the sense of what 3.2.1 is meant to prohibit, because these kinds of split chapters are typically also released as whole ones in other mediums (magazines, volumes) — that's kind of the point of the split decimal numbering in the first place.
I'm repeating my previous point, but few if any manga are actually structured like this from the start. It's more a consequence of certain (web) release platforms staggering the releases compared to what the original compiled work is intended to be, as indicated by the chapter numbering.
In short, these kinds of split chapters are allowed to be released split first, combined first, or recombined later.
Then either 3.2.1 should be made clearer on what constitutes a chapter, or an additional point should be added that unambiguously addresses sub-chapters. Furthermore 3.2.2 should also be edited. "Chapters that have been split up by the scanlators for any other reason may be recombined into singular whole chapters." This sets the case for "any other reason", implying that if the reason is that the source was also split, then it should not be recombined.
Until and unless the chapters have already been collated into tanks or something, which they usually aren't on first release, you're basically saying the group gets to exercise their own judgement as to what's a chapter, which doesn't make sense to the spirit of the rule of respecting chapters. Some mangaka treat sub-chapters as "chapters" with a proper front and end, some don't. Different groups have different opinions. The one unambiguous thing about source sub-chapters is they are released separately. This is what the uploads here should follow. Or else your rules are pretty weak, they are open to arbitrary compliance.
But that's my opinion. Clearly you don't agree, so at the least, the rules need to be clearer, because it's obvious a majority here understand it the way I do.
Despite all I've said, I also ultimately don't give that much of a whit about those rules, and I don't think most here do either. This was about an entitled fellow making a fool of themselves by acting like a demanding beggar. I get that nobody engaged in disallowed conduct, even when acting like that...but if you don't mind me saying, just feels a little disappointing to see staff only chastise posters on my side of the discussion.
The main complaint about the split this time is the timeframe of the uploads, they were uploaded so close together that they could have just uploaded it as one chapter.
I've seen this group face accusations that they hold back releases when they upload sometimes all at once. You just can't win.
There's a third part to this chapter 16 anyway. If you include all of these sub chapters this time, they're released over a few days. Where do you draw the line, where on one hand they hold back the parts they already finished versus releasing them as they finish them? Seems really silly to even try and make a distinction to me. But as above, the real damn point is not even that. It's the behavior.