Form fields are not getting set on given desired location but are getting set at the end of the page

I'm trying to execute PUT /agreements/{agreementId}/formfields, the following Add form fields API for adding the desired form fields in the create agreement. The following is the JSON snippet -

{
  "fields": [
    {
     "locations": [
          {
            "pageNumber": "1",
            "height": 5.5199966,
            "left": 72.024,
            "top": 104.77997,
            "width": 150
          }
        ],
        "contentType": "SIGNATURE_BLOCK",
        "name": "sigBlock1",
        "inputType": "SIGNATURE",
        "recipientIndex":1
       }
]}

I've given the following coordinates where the signature block should be placed, but it is not getting placed on the desired position but is getting placed at the end of the page. Through API it is getting 200 OK response.  Can you tell me the reason why this is happening?