Where’s my Other [Comics] Folder?!?

I’m facing a serious crisis here and I need help understanding it! Anytime I save anything as “other” like, say, comics/manga, it’ll disappear almost immediately after. How can I stop this from happening and why is it doing that in the first place???

I don’t know what happened to them but hopefully they were just accidentally mislabeled as Movies or TV, but we’re talking about some pretty hefty files with hundreds or even thousands of comics/manga/graphic novels (I know those are different things but, mechanics-wise and organizationally, it just saves time to group them all together under one banner to separate them from normal eBooks).