ElasticSearch mapping problem

gistfile1.txt

# Below, I'm showing command line in > and log output as $$$$
_______________________________________________________________

>curl -XPUT 'http://localhost:9200/feeds'
$$$$ LOG RESPONSE: {"ok":true,"acknowledged":true}

>curl -XPUT 'http://localhost:9200/feeds/social/_mapping' -d '
{
    \"social\": {
        \"properties\": {
						\"category\": {
                \"type\": \"multi_field\",
                \"fields\": {
                    \"category\": {
                        \"include_in_all\": false,
                        \"index\": \"not_analyzed\",
                        \"type\": \"string\"
                    },
                    \"category_index\": {
                        \"include_in_all\": false,
                        \"type\": \"string\"
                    }
                }
            }
        }
    }
}'
$$$$ LOG RESPONSE: {"ok":true,"acknowledged":true}

>curl -XPUT 'http://localhost:9200/_bulk' -d '
{
    \"index\": {
        \"_index\": \"feeds\",
        \"_type\": \"social\",
        \"_id\": \"1\"
    }
}
{
    \"feeds\": {
        \"category\": \"tweets\",
        \"source\": \"twitter\",
        \"author_name\": \"Theia_Mania66 (Chio Rodriguez)\",
        \"full_text\": \"Rollins and the Phillies can close. Thats why theyve won 4 straight divisions and a title.\"
    }
}'
$$$$ LOG RESPONSE: {"took":2,"items":[{"index":{"_index":"feeds","_type":"social","_id":"1","_version":1,"ok":true}}]}

>curl -XGET 'http://localhost:9200/_search' -d '
{
    "from": 0,
    "size" : 50,
    "query" : {
        "filtered" : {
            "query" : {
                "wildcard" : {"_id": "*"}
            },
            "filter" : {
                "bool" : {
                    "must" : [
                        {
                            "term" : {
                                "category" : "tweets"
                            } 
                        } 
                    ]
                }
            }
        }
    } 
}'
$$$$ LOG RESPONSE: {"took":4,"timed_out":false,"_shards":{"total":20,"successful":20,"failed":0},"hits":{"total":0,"max_score":null,"hits":[]}}