Btw, this group posted a correct chapter. The original artist posted the colored version of chapter 3 as chapter 14 at their Pixiv page. They did the same with chapter 15 (colored version of chapter 7).
If you're just looking at artist's Pixiv, the old translator group (you outta pocket) uploaded most of the chapters with wrong numbering.
Chapter 1 that you outta pocket uploaded was a pre-serialization teaser (basically chapter 0) posted only at artist's Fanbox.
Pixiv's chapter 1 was posted as chapter 2
Chapter 2 -> chapter 3
Chapter 3 -> chapter 4
Chapter 4 -> chapter 5
Chapter 5 -> chapter 6
Chapter 6 -> chapter 7
Chapter 7 -> chapter 8
Chapter 8 -> chapter 9
Chapter 9 -> chapter 10
Chapter 10 -> chapter 11
Chapter 11 -> chapter 11.5
If you're just looking at artist's Pixiv, the old translator group (you outta pocket) uploaded most of the chapters with wrong numbering.
Chapter 1 that you outta pocket uploaded was a pre-serialization teaser (basically chapter 0) posted only at artist's Fanbox.
Pixiv's chapter 1 was posted as chapter 2
Chapter 2 -> chapter 3
Chapter 3 -> chapter 4
Chapter 4 -> chapter 5
Chapter 5 -> chapter 6
Chapter 6 -> chapter 7
Chapter 7 -> chapter 8
Chapter 8 -> chapter 9
Chapter 9 -> chapter 10
Chapter 10 -> chapter 11
Chapter 11 -> chapter 11.5
