Kibana hits are different

welcome!!!

In the discover tab without querying anything i should see approx 36,942,343 or more hits whereas i see approx 26,304,276 hits...
Expected hits are 36 million or more

during indexing I see the following error in logstash:
[2017-10-05T17:22:10,166][WARN ][logstash.outputs.elasticsearch] UNEXPECTED POOL ERROR {:e=>#<LogStash::Outputs::ElasticSearch::HttpClient::Pool::NoConnectionAvailableError: No Available connections>}
[2017-10-05T17:22:10,166][ERROR][logstash.outputs.elasticsearch] Attempted to send a bulk request to elasticsearch, but no there are no living connections in the con:

There are no errors in elastic search and kibana logs..

there were 2 index pattern and one had issues which has been removed from logstash file could it be because of that?

But elasticsearch was working fine....
I am not sure why kibana hits are way off the correct value