title: Elastic search index number of documents and scores change when recreating index from scratch
body: <p>I have been experimenting with elasticsearch, and am stuck on understanding scoring and indexation.</p>
  
  <p>I created a river/mapping/analyzer (folding, normalization, stemming) and request to benchmark on. All of this seems to work pretty well, however I observe that if I delete my index and recreate it with the exact same configuration, the scores as well as the order of the results of my request change. </p>
  
  <p>Moreover, the number of documents and the size of the index change upon recreation (23.718 docs/19.7MB to 20.072/13.5MB for instance) while there is no sign of error in elasticsearch logs and the query in my river always outputs the same number of rows.</p>
  
  <p>Is that possibly expected? If not, where should I look and what could be wrong?</p>
  
  <p><strong>EDIT:</strong>
  I am using elasticsearch 1.1.1, with mysql (5.5) river using mysql-jdbc 5.1.26 and elasticsearch river-jdbc 2.2.2</p>
  
  <p>Thanks in advance</p>