@legacy3233 No, it's because 17.1, 17.2, and 17.3 are actually chapters 17, 19, and 20 in order of publication. But since they're part of an arc, the scanlators took the liberty of numbering them accordingly and moving chapter 18 to make space for chapters 19 and 20. It is weird, though, since the last 3 chapters are part of an arc, too, but they're not numbered 22.1, 22.2, and 22.3.