@big_bean69 Your chapter's image is 600 x 851 while the raw is 1872 x 2657. Please use Image Max URL to get the full image on Pixiv and not a sample. Also, don't add "Chapter 1" as the title. It can be blank.
I edited in the new page with the rain sounds to this chapter. If you go to the title page of this manga there's a pencil icon next to your chapter. Click that to edit the chapter information and pages. This isn't compiled in a volume too, so you can leave the volume number blank as well. Also please look at my above comment.