Query returns incomplete result

[Lu, Boying]

Hi, All,

I use the astyanax 1.56.48 + Cassandra 2.0.6 in my test codes and do some query 
like this:

query = keyspace.prepareQuery(..).getKey(...)
.autoPaginate(true)
.withColumnRange(new RangeBuilder().setLimit(pageSize).build());

ColumnList<IndexColumnName> result;
result= query.execute().getResult();
while (!result.isEmpty()) {
//handle result here
result= query.execute().getResult();
}

There are 2003 records in the DB, if the pageSize is set to 1100, I get only 
2002 records back.
and if the pageSize is set to 3000, I can get the all 2003 records back.

Does anyone know why? Is it a bug?

Thanks

Boying