I assumed it was double wide pages. Images that show two pages. Rereading it again it again, notshotacon's comment makes more sense. If that's the case it would be the opposite of, multipanel sequence.

OP must be talking about doujin like this: #371443 | Tsutomesaki no Musume-san o Oishiku ita… | 66,395 If that is the case then tag name is wrong. Even if corrected to something like 'duplicated pages' I don't see any meaningful merit to creating the tag.

I assume you mean works where they have like one scene and just change a small part in each new page. Like PAGE 1: A man about to insert, PAGE 2: He penetrates, PAGE 3: creampie. I like the idea but not the name. It should be called like stop motion If you arent talking about that then idk what the point of this tag would be