Default sharding strategy doesn't save all entities in all shards

gistfile1.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Raven.Client.Document;
using Raven.Client.Shard;
using Raven.Client.Embedded;
using Raven.Client;
using Xunit;

namespace Raven.Tests.UpdateCascade
{
	public class CreditCardType
	{
		public string Id { get; set; }
		public string Name { get; set; }		
	}


	public class ShardingTest : IDisposable
	{

		DocumentStore shard1;
		DocumentStore shard2;

		ShardedDocumentStore store;

		ShardStrategy strategy;

		#region IDisposable Members

		public ShardingTest()
		{
			shard1 = new EmbeddableDocumentStore
			{
				RunInMemory = true
			};
			shard1.Initialize();

			shard2 = new EmbeddableDocumentStore
			{
				RunInMemory = true
			};
			shard1.Initialize();

			strategy = new ShardStrategy(new Dictionary<string, IDocumentStore> 
			{
				{ "shard1", shard1 },
				{ "shard2", shard2 }

			});

			store = new ShardedDocumentStore(strategy);
			store.Initialize();
		}


		public bool IsDisposed { get; private set; }

		public void Dispose()
		{
			if (store != null) store.Dispose();
			if (shard1 != null) shard1.Dispose();
			if (shard2 != null) shard2.Dispose();
		}

		#endregion

		[Fact]
		public void DefaultStrategyShouldStoreToAllShards()
		{
			using (var session = store.OpenSession())
			{
				var visa = new CreditCardType { Id = "CreditCardsTypes/Visa", Name = "Visa" };
				session.Store(visa);
				session.SaveChanges();
			}


			using (var session = shard1.OpenSession())
			{
				var cc = session.Load<CreditCardType>("CreditCardsTypes/Visa");
				Assert.NotNull(cc);
				Assert.Equal(cc.Name, "Visa");
			}

			using (var session = shard2.OpenSession())
			{
				var cc = session.Load<CreditCardType>("CreditCardsTypes/Visa");
				Assert.NotNull(cc);
				Assert.Equal(cc.Name, "Visa");
			}
		}
	}
}