it seems u r ryt for the down train. for the up train it has three sleepers for sure as personally observed by me...
Accommodation Availability Enquiry
53172 LGL SDAH PASS 9-9-2013 LALGOLA SEALDAH * Lower Berth Quota
S.No. Date (DD-MM-YYYY) Class - SL Class -FC
1...
more... 9- 9-2013 AVAILABLE 4 NOT AVAILABLE
2 10- 9-2013 AVAILABLE 4 NOT AVAILABLE
3 11- 9-2013 AVAILABLE 4 NOT AVAILABLE
4 12- 9-2013 AVAILABLE 4 NOT AVAILABLE
5 13- 9-2013 AVAILABLE 4 NOT AVAILABLE
6 14- 9-2013 AVAILABLE 3 NOT AVAILABLE