Bitemporal queries returning different number of records each time about cassandra-lucene-index HOT 6 CLOSED

BEGIN BATCH
UPDATE tab1 SET tt_to = '2015/06/29' 
WHERE key = 'someKey' AND vt_from = '2015/01/01' 
AND tt_from = '2015/01/01' IF tt_to = '2200/12/31';
INSERT INTO tab1(key, city, vt_from, vt_to, tt_from, tt_to) 
VALUES ('someKey', '2015/03/05', '2200/12/31', '2015/06/30', '2200/12/31');
APPLY BATCH;

SELECT * FROM tab1 WHERE lucene='{filter : {
type:"boolean",
must:[
 {type : "bitemporal", 
  field : "bitemporal", 
  vt_from : "2015/08/28 10:46:23:629", 
  vt_to : "2015/08/28 10:46:23:629", 
  tt_from : "2015/08/28 10:46:23:629", 
  tt_to : "2015/08/28 10:46:23:629" }
  ]}, 
refresh:true}' 
AND key='someKey';

CREATE TABLE tab1 (
    key text,
    value blob,
    vt_from text,
    vt_to text,
    tt_from text,
    tt_to text,
    lucene text,
    PRIMARY KEY (key)
);

CREATE CUSTOM INDEX tab1_index on tab1(lucene)
USING 'com.stratio.cassandra.lucene.Index'
WITH OPTIONS = {
    'refresh_seconds' : '1',
    'schema' : '{
        fields : {
            key : {type: "string"},
            bitemporal : {
                type : "bitemporal",
                tt_from : "tt_from",
                tt_to : "tt_to",
                vt_from : "vt_from",
                vt_to : "vt_to",
                pattern : "yyyy/MM/dd HH:mm:ss:SSS"}
        }
}'};

SELECT vt_from, vt_to, tt_from, tt_to  FROM tab1 WHERE key='someKey';

CREATE CUSTOM INDEX tab1_index on tab1(lucene)
USING 'com.stratio.cassandra.lucene.Index'
WITH OPTIONS = {
    'refresh_seconds' : '1',
    'schema' : '{
        fields : {
            key : {type: "string"},
            vt_from : {type:"date", pattern : "yyyy/MM/dd HH:mm:ss:SSS},
            vt_to : {type:"date", pattern : "yyyy/MM/dd HH:mm:ss:SSS},
            tt_from : {type:"date", pattern : "yyyy/MM/dd HH:mm:ss:SSS},
            tt_to : {type:"date", pattern : "yyyy/MM/dd HH:mm:ss:SSS},
            bitemporal : {
                type : "bitemporal",
                tt_from : "tt_from",
                tt_to : "tt_to",
                vt_from : "vt_from",
                vt_to : "vt_to",
                pattern : "yyyy/MM/dd HH:mm:ss:SSS"}
        }
}'};

SELECT * FROM tab1 WHERE lucene='{filter : {
type:"boolean",
must:[
 {type : "range", 
  field : "vt_from", 
  upper : "2015/08/28 10:46:23:629", 
  include_upper : true },
 {type : "range", 
  field : "vt_to", 
  lower : "2015/08/28 10:46:23:629", 
  include_lower : true},
 {type : "range", 
  field : "tt_from", 
  upper : "2015/08/28 10:46:23:629", 
  include_upper : true },
 {type : "range", 
  field : "tt_to", 
  lower : "2015/08/28 10:46:23:629", 
  include_lower : true}
  ]}, 
refresh:true}' 
AND key='someKey';

CREATE TABLE tab1 (
    key text,
    value blob,
    vt_from text,
    vt_to text,
    tt_from text,
    tt_to text,
    lucene text,
    PRIMARY KEY (key)
);