Pagination not working

I have read through the guide(s) and posts, but still not able to solve the issue.

The pagination info is on the top of the API response 
I am on page 2, reteriving only 1 record. I can reterieve max 100.
This the API endpoint i am using: /api/result?pageNumber=2&pageSize=1

{
    "pagination": {
        "total": 29486,
        "pages": 14743,
        "page": 2,
        "pagesize": 1
    },
    "data": {
        "cases": [
            {
                "index": 1,
                "id": 1,
                "subject": "Hidden",
                "description": "Hidden",
                "plaintext": "Hidden",
                "solution": "Hidden",
                "status": "Hidden",
                "priority": null,
                "impact": "Hidden"
}
        ],
        "total": 1
    }
}

I have overridden pagination - because not all endpoints are paginated.

I dont want to reterieve all pages (which are 30 if i reterieve 1000 records per pageSize) before i know i can reterieve first 5

This setting should be 500 records, but i am only getting 100