The sales of the books or downloads of KENP pages does no directly generate the sales rank for a book.

There are many factors that influence the sales rank, like the look inside, A+ content, keyword, categories and search activity on your book etc.

Hello,

I'm Ranesh one of the Customer Support Manager at Amazon KDP.

I understand your concern about sales ranking.

You have posted Quetions about why 191 pre-orders was not applied to the book, downloads for 48743 KENP pages on the 14th didn't change the rank at all and explain why the rank went from 104,000 (rounded) down to 3500 (rounded) without that level of sales and KU downloads to support it on that day.

The sales of the books or downloads of KENP pages does no directly generate the sales rank for a book.

There are many factors that influence the sales rank, like the look inside, A+ content, keyword, categories and search activity on your book etc.

Sales rank are updated with reflect of recent and historical activity, with recent activity weighted more heavily. Rankings are relative, so your sales rank can change even when your book's level of activity stays the same. For example, even if your book's level of activity stays the same, your rank may improve if other books see a decrease in activity, or your rank may drop if other books see an increase in activity.

When the the rank went from 104,000 down to 3500 then you might felt that might be a glitch or lag in the system, I can understand that, some times there might be a lag but not for like 6 days as you mentioned.

I have double checked the ranking for this book Asin's now B0F9DP8PD3 & B0F6YP26KY and it shows the ranking is accurate, further we are unable to take any action in this case as the ranking is working as designed now.

Thanks for using Amazon KDP,

Your feedback helps us improve our service.

Ranesh
Kindle Direct Publishing
http://kdp.amazon.com