Number of data and included entries mismatch

[sachaw]

I'm sure that i'm missing something, but cant work it out.
When I call: https://kitsu.io/api/edge/users/65919/library-entries?[type]=media&page[limit]=500&filter[kind]=anime&include=anime
I get 500 data entries and only 499 included entries,
The issue does not seem to persist when I move onto the next page:
https://kitsu.io/api/edge/users/65919/library-entries?[type]=media&page[limit]=500&filter[kind]=anime&include=anime&page[offset]=500