Symptom:
There is a time difference printed in the CSV files generated by the hunt group stats reports. While the file shows that the collection of statistics took place at 8pm for example, the actual data shown is from 2-3 hours prior of that time, it could even be more some times. For example:

20:00:01 EST Tue Apr 15 2014																				
EPHONE HUNT GROUP STAT															
1	 Tue 16:00 - 17:00	 HuntGp	2	0	0	0	0	0	0	0	0	0	0	0	0
1	 Tue 16:00 - 17:00	 Agent	3001	0	0	0	0	0	0	1	7	7	0	0	0
1	 Tue 16:00 - 17:00	 Agent	3002	0	0	0	0	0	0	1	4	4	0	0	0

This is happening due precise time condition checks while generating csv file.

Conditions:
B-ACD is being used for call queuing.

'statistics collect' enabled inside ephone-hunt

The following commands are included inside telephony-service:
hunt-group report url prefix <URL>
hunt-group report url suffix <number> to <number>
hunt-group report every <Hours> hours