In February 2016, Amazon adjusted the algorithm used to tabulate pages read and total page count of an eBook with KENCP 2.0. (bbebooksthailand.com)
Horton also mentions that the process used to submit your research plan, in which one section is submitted at a time, gives applicants less control over the total page count. (sciencemag.org)
There is no need to supply the total page count. (sciencemag.org)