Probably an error - duplicated chapters
No, it's because its translator had asked for this chapter not to be uploaded out of a private group. The chap was unfortunately leaked on other sites, so sunbaejin (the translator) asked the websites to remove it.
do you know if it possible to access the chapters that sunbaejin translates or does she not wish to share it with people outside the private group?
i've read somewhere that she shares translation with people that buy raws
Is it because the other one (was it chap 29?) was not translated by punchingrice?