
TLDR;
The most recent update is Chapter 23 of Volume 7. But numerically that chapter is supposed to be Chapter 29. That's why you're confused...
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All the chapter are uploaded in perfectly correct order. The chapters are just incorrectly named.
Volume 1 has Chapter 01 to Chapter 03
Volume 2 has Chapter 04 to Chapter 08
Volume 3 has Chapter 09 to Chapter 13
Volume 4 & Volume 5 have Chapter 14 to Chapter 24
Volume 6 has Chapter 25 to Chapter 28
Volume 7 has Chapter 29 to Chapter 35
Volume 8 has Chapter 36 onwards...
The author decided to rename the Chapter numbers from Volume 4 onwards. So, the first chapter of Volume 4, which was supposed to be Chapter 14 was called as Chapter 8. Therefore...
Volume 4 & Volume 5 have Chapter 14 to Chapter 24
Which was renamed by author, as following :
Volume 4 & Volume 5 have Chapter 08 to Chapter 18
In short, in Volume 4 & Volume 5 :
Chapter 08 = Chapter 14
Chapter 09 = Chapter 15
Chapter 10 = Chapter 16
Chapter 11 = Chapter 17
Chapter 12 = Chapter 18
Chapter 13 = Chapter 19
Chapter 14 = Chapter 20
Chapter 15 = Chapter 21
Chapter 16 = Chapter 22
Chapter 17 = Chapter 23
Chapter 18 = Chapter 24
Similarly for Volume 6,
Volume 6 has Chapter 25 to Chapter 28
Which was renamed by author, as following :
Volume 6 has Chapter 19 to Chapter 22
So,
Chapter 19 = Chapter 25
Chapter 20 = Chapter 26
Chapter 21 = Chapter 27
Chapter 22 = Chapter 28
Similarly for Volume 7,
Volume 7 has Chapter 29 to Chapter 35
Which was renamed by author, as following :
Volume 7 has Chapter 23 to Chapter 29
So,
Chapter 23 = Chapter 29
Chapter 24 = Chapter 30
Chapter 25 = Chapter 31
Chapter 26 = Chapter 32
Chapter 27 = Chapter 33
Chapter 28 = Chapter 34
Chapter 29 = Chapter 35
the latest chapters, I'm confused? What's wrong with the arrangements huhu.