No need to delete, the way you updated it works! Takes a bit to figure it all out when you’re uploading for the first time. You can check here for specifics on updating galleries: https://ehwiki.org/wiki/Making_Galleries#Updating
Also, do note the bump limit. (It’s also on that wiki link.) One more update to add the missing page should be fine, but otherwise, best to leave the gallery as-is for a bit.
On the topic of the TL, you're wildly inconsistent with your capitalization. Capitalize at the start of a sentence and end with punctuation (period, question mark, etc.).
@Fireboy2009 thanks for the tip, I'll try to be more considerate of it in the near future! I thought that was how they do it since I usually get references on sound effects, etc. On other doujin works.