Agg last 15 minutes returning just last 2 minutes

Elastic Stack Elasticsearch
12 
GET forensics/_search
{
  "size": 1,
  "query": {
    "bool": {
      "must": [
        {
          "range": {
            "@timestamp": {
              "gte": "now-1d/d",
              "lte": "now"
            }
          }
        }
      ]
    },
    "sort" : [
        { "@timestamp" : {"order" : "asc"}}
    ]
  }
}