Query did not return all documents if collection using a hashed shard key

MongoDB 3.0.6

If a collection used a hashed shard key (

), queries like "select * from ..." may not return all documents which should be returned from the collection.

Test Case:
Create 3 mongos, 3 config, 3 replicaset each with 3 mongod.
Create one collection with hashed shard key.
Insert 6 documents to this collection with shard key value 1,2,3,4,5,6
Do a query select * from ....
Only 2,3,4 will be returned.