Why the number is different?

it’s me again, I have a question about the number of unit download.
At download page, for example the URL: www.ndl.go.jp/jp/diet/publication/issue/0554.pdf

the number of unit download is 59

but I search the same link with Visitor Segment function

the result is not 59, is different. turn to 127.

Why did this happed? was it got to do with “Others”? If it was, what was that?
could anyone give me some advise!?