Cancelled API in production getting less data in response

I am calling /suborders/cancelled API in production

I am getting only one item but there are multiple cancelled orders.

How to get all cancellled orders in a single API?

or
How to get all cancellled orders between a month in a single API?

passing this timestamp in headers but getting only one data thats not in the date range given

startDate 1459449000000
endDate 1461954600000

whats wrong??