Index template - index pattern does not match index name

[dorinand]

I am playing with roolover of indices via ILM. I created index template for all printmessage_charizard_1 indices:

    {
      "order": 0,
      "index_patterns": [
        "printmessage_charizard_1-*"
      ],
      "settings": {
        "index": {
          "lifecycle": {
            "name": "my_policy1",
            "rollover_alias": "charizard"
          },
          "number_of_shards": "2",
          "number_of_replicas": "1"
        }
      },
      "mappings": {},
      "aliases": {}
    }

When I send data from logstash, new index is created named printmessage_charizard_1 but it did not have 2 shards. It use default template, 1 shard, 1 replica. When I try the same queries with example from ILM (mentionet above), it works:

{
  "order": 0,
  "index_patterns": [
    "datastream-*"
  ],
  "settings": {
    "index": {
      "lifecycle": {
        "name": "datastream_policy",
        "rollover_alias": "datastream"
      },
      "number_of_shards": "1",
      "number_of_replicas": "0"
    }
  },
  "mappings": {},
  "aliases": {}
}

If I change index pattern to:

{
  "order": 0,
  "index_patterns": [
    "printmessage_chariz*"
  ],
  "settings": {
    "index": {
      "lifecycle": {
        "name": "my_policy1",
        "rollover_alias": "charizard"
      },
      "number_of_shards": "2",
      "number_of_replicas": "1"
    }
  },
  "mappings": {},
  "aliases": {}
}

It will match it template partly. It will create printmessage_charizard_1 index with two shards and one replica, but it does not use rollover_alias. So I have there two indices printmessage_charizard_1 - without alias, full of my logs, and printmessage_charizard_1-000001 with alias and empty.

1. What does I missing, why does my pattern does not match/or just partly match charizard index?
2. Why does it work with datastream index?
3. I would expect that star (*) would match any chars.