When I drag & drop a PDF file into Photoshop , the page order will be like 5,4,3,2,1 so you have to put them in order ONE-by-One ... that's a problem when you have like 500 pages ... it's in the PDF presentation menu When you'd like to create a Multi-page PDF... it should be an option to put the imported PDF pages in the right order. The right order would be like 1,2,3,4,5.....etc.
Somebody has the same problem in 2014 on your forum. Even R_Kelly couldn't aswer it :D:D Check it:
"in Photoshop cs6, I am working on a multipage pdf catalog. When I import or open the pdf in Photoshop, it reverses the order of page. for example: Page 4, Page 3, Page 2, Page1. And when i batch>automate pdf presentation, it save the pages in the wrong order. How do i get it to open and batch pdf presentation in the right order?"