@exogriz
Your point about ".5" and "part 2" being redundant is very true, but I'm not sure if the uploaders would change it since they have been following the same format ever since the chapters began to be split in 2 at chapter 82. Hatigarm group also looks like they are following this format on their website ever since they picked it up about 90 chapters ago.
As for the suggestion about adding a "version 2" to the title, it is a valid idea for the uploader, especially since Hatigarm went back and redid the first 60 chapters. But I don't think the uploaders, especially if they are part of Hatigarm, would be happy about having to change their titles based on whether sniping occurs on Mangadex. It also looks like this is the first time the series has been sniped, unless previous ones have been removed. And Hatigarm released 209 on their site , 8 days ago on Jan 27. The snipe was uploaded about 9 days ago. Not sure why Hatigarm's version was uploaded here only just now, maybe the usual uploaders got confused.