Not analyzed field and its role in the _all field

gistfile1.txt

curl -XDELETE 'http://localhost:9200/blog/'

curl -XPUT 'http://localhost:9200/blog/'

curl -XPUT 'http://localhost:9200/blog/doc/_mapping' -d '
{
    "doc" : {
	"dynamic" : false,
        "properties" : {
            "title" : { "type" : "string"},
            "summary" : { "type" : "string" },
            "tags" : { type: "string", "index" : "not_analyzed" },
            "user_id" : { type: "long" }
        }
    }
}'

curl -X POST "http://localhost:9200/blog/doc" -d '{ "title" : "some title 1", "summary" : "some summary 1", "tags" : "@@more-help", "user_id" : 1 }' 
curl -X POST "http://localhost:9200/blog/doc" -d '{ "title" : "some title 2", "summary" : "some summary 2", "tags" : "@@more-sugar", "user_id" : 2 }'
curl -X POST "http://localhost:9200/blog/doc" -d '{ "title" : "some title 3", "summary" : "some summary 3", "tags" : "@@more-info", "user_id" : 11 }'

# tags field that is not_analyzed does not seem to have its content in the _all field
curl -X GET "http://localhost:9200/blog/_search?pretty=true" -d '{ "query": { "query_string": { "query": "@@more-help*" } } }'
{
  "took" : 5,
  "timed_out" : false,
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "failed" : 0
  },
  "hits" : {
    "total" : 0,
    "max_score" : null,
    "hits" : [ ]
  }
}

# can be queried by specifying the field
curl -X GET "http://localhost:9200/blog/_search?pretty=true" -d '{ "query": { "query_string": { "query": "tags:@@more-help*" } } }'
{
  "took" : 1,
  "timed_out" : false,
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "failed" : 0
  },
  "hits" : {
    "total" : 1,
    "max_score" : 1.0,
    "hits" : [ {
      "_index" : "blog",
      "_type" : "doc",
      "_id" : "WDa3gL8yRxGk8GGrQm2WBA",
      "_score" : 1.0, "_source" : { "title" : "some title 1", "summary" : "some summary 1", "tags" : "@@more-help", "user_id" : 1 }
    } ]
  }
}

# tags field looks like it was analyzed for the _all field even though its set to not_analyzed
curl -X GET "http://localhost:9200/blog/_search?pretty=true" -d '{ "query": { "query_string": { "query": "more AND help" } } }'
{
  "took" : 2,
  "timed_out" : false,
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "failed" : 0
  },
  "hits" : {
    "total" : 1,
    "max_score" : 0.0958915,
    "hits" : [ {
      "_index" : "blog",
      "_type" : "doc",
      "_id" : "WDa3gL8yRxGk8GGrQm2WBA",
      "_score" : 0.0958915, "_source" : { "title" : "some title 1", "summary" : "some summary 1", "tags" : "@@more-help", "user_id" : 1 }
    } ]
  }
}

curl -X GET "http://localhost:9200/blog/_search?pretty=true" -d '{ "query": { "query_string": { "query": "more*" } } }'
{
  "took" : 1,
  "timed_out" : false,
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "failed" : 0
  },
  "hits" : {
    "total" : 3,
    "max_score" : 1.0,
    "hits" : [ {
      "_index" : "blog",
      "_type" : "doc",
      "_id" : "-awdsUwIRA20IcP1TMsRNw",
      "_score" : 1.0, "_source" : { "title" : "some title 3", "summary" : "some summary 3", "tags" : "@@more-info", "user_id" : 11 }
    }, {
      "_index" : "blog",
      "_type" : "doc",
      "_id" : "WDa3gL8yRxGk8GGrQm2WBA",
      "_score" : 1.0, "_source" : { "title" : "some title 1", "summary" : "some summary 1", "tags" : "@@more-help", "user_id" : 1 }
    }, {
      "_index" : "blog",
      "_type" : "doc",
      "_id" : "s0rynjY4Rb-O6_RskE6CxQ",
      "_score" : 1.0, "_source" : { "title" : "some title 2", "summary" : "some summary 2", "tags" : "@@more-sugar", "user_id" : 2 }
    } ]
  }
}

# Should not_analyzed fields be analyzed for the _all field? 
# Shouldnt the not_analyzed field have its not_analyzed content in the _all field?