Elastic Search/Kibana 5.2 and Logstash 5.0.2 with kafka 0.9

We create the first indices 30 shards with logstash*-000001 and using time/log count  and curator with rollover api and Alias to rollover indices. We are getting indices created with rollover but with 10:1 shards:replicas. Not sure where ES or Logstash is taking 10:1 instead of 30:1. Any help will be greatly helpful.

FYI.. we have other indices created for diff app with 10:1 with same elastic search cluster, not sure it matters.

Thank you in advance

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