the novel Artifact Planting Space has a problem with the numberinv and the group name. from chapter 32 to 35 oy says v1ch32 to v1ch35 but before and after that it doesn't have v1 in it. The chapters after it comes under a blank group name while it is the same group.
What's the RSS link? Or do you add releases to NU manually (your viewers do*)? Either there's a problem with the RSS or whoever sent the links messed up. In any case: NU > alcachooo > User Profile > Report Problem, is where you should report website.
first issue - numbering these chapters appears to be manually submitted (by you) v1c32 v1c33 v1c34 v1c35 while the last two, c36 and c37 were added by NU's bot. from what i can see, you are not labelling your chapters with 'volume number' at all. it is simply not possible for the bot to 'guess' your intention and auto adds something that's doesn't exist. in this case, volume number. if you want the listing to have v1 v2 and the likes, you'll have to put them on your chapters (in the page's title). for example, c37's should be Artifact Planting Space Volume 1 Chapter 37 "Mechanical shackles" or Artifact Planting Space Book 1 Chapter 37 "Mechanical shackles" similarly, if the chapters are splitted, it should be properly titled Artifact Planting Space Volume 1 Chapter 37 Part 1 "Mechanical shackles" 2nd issue - missing group name you, or someone, added a duplicate of the group name, and one of them was deleted by the admin, causing it to appears blank. i have fix the listing, for now. while the blank group is fixed, the numbering of future chapters will depends on how you named/numbered your chapters, as i explained above.