If you manually set the count to return by using SetInlineCount or NextPageLink, the QueryableAttribute action filter overwrites it, so your value is never returned in the response.
Confirmed as a bug by "raghuramn". A workaround exists in the discussion.
Link to discussion: https://aspnetwebstack.codeplex.com/discussions/439302#post1026333
Confirmed as a bug by "raghuramn". A workaround exists in the discussion.
Link to discussion: https://aspnetwebstack.codeplex.com/discussions/439302#post1026333