Connecting kinesis analytics to lambda direcltly and also indirectly by using kinesis stream results in different output

Question

I am facing a very strange problem and I am not sure if it is a bug in aws or my lack of understanding.

Here is the problem. I have a kinesis analytins reoprting every 40 seconds. so lets say it reported the following 40 second ago:

{frist row with some data}, {second row with some data}

So I connect the kinesis analitycs to two destination: 1) lambda: and the result lambda is recieving is as follows:

{
"invocationId": "2db390f4-d5a1-49cf-a792-73827d37ec34",
"applicationArn": "arn:aws:kinesisanalytics:us-east-1:638417958056:application/-analytic-app-trending-stories",
"records": [
    {
        "recordId": "672e17e4-06a9-41cb-a5ba-341cf5f3b879",
        "lambdaDeliveryRecordMetadata": {
            "retryHint": 0
        },
        "data": "eyJzSWQiOjQ0NDQ0LCJjSWQiOjExMjIyLCJjb3VudCI6MjAuMCwicm93VGltZTEiOiIyMDE4LTAxLTE2IDE0OjE2OjQwLjAwMSJ9"
    },
    {
        "recordId": "6fbb409d-ddb0-40b7-b700-45b7ce87abe2",
        "lambdaDeliveryRecordMetadata": {
            "retryHint": 0
        },
        "data": "eyJzSWQiOjQ0NDQ0LCJjSWQiOjIyMiwiY291bnQiOjEzLjAsInJvd1RpbWUxIjoiMjAxOC0wMS0xNiAxNDoxNjo0MC4wMDEifQ=="
    }
]
  }

So as you can see two rows were sent to lambda in one payload and obviously we have to data in array format seond to lambda. After decoding the content of the data in each record I see the same results sent from analytics. So far so good but the problem starts here: I connected analytics to kinesis stream and then I connected the stream to lambda. I expect the same result happened in the first sceario I mean two records in one payload shouuld be recieved in second lambda but suprisingly I recienve just one record in each payload and seems that stream split array and send it in different way for more clarification here is the payload I get:

{
"Records": [
    {
        "kinesis": {
            "kinesisSchemaVersion": "1.0",
            "partitionKey": "hh",
            "sequenceNumber": "49580809756311348244603591366792053449767996205245136898",
            "data": "eyJzSWQiOjQ0NDQ0LCJjSWQiOjExMjIyLCJjb3VudCI6MjAuMCwicm93VGltZTEiOiIyMDE4LTAxLTE2IDE0OjE2OjQwLjAwMSJ9",
            "approximateArrivalTimestamp": 1516112247.8
        },
        "eventSource": "aws:kinesis",
        "eventVersion": "1.0",
        "eventID": "shardId-000000000000:49580809756311348244603591366792053449767996205245136898",
        "eventName": "aws:kinesis:record",
        "invokeIdentityArn": ".....lambda-img-resizer-role",
        "awsRegion": "us-east-1",
        "eventSourceARN": "arn:aws:kinesis:us-east-1:638417958056:stream/bni-tj-sbx22-stream-trending-stories-output"
    }
]
 }

As you see in the payload we have just one data attr. I am totally lost can anyone shed light on this?