I searched internet and found that so far order of 60 days are not revised. please look at the link click here or read it here :
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Press Information Bureau
Government of India
Ministry...
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of Railways
21-May-2014 14:21 IST
Computerised Booking of Retiring Rooms on Indian Railways

Indian Railways provides lodging facility through retiring rooms to its passengers at stations spread across the country. The Retiring Room Application has been developed to computerize the booking of retiring rooms at the railway stations.
At present, booking of retiring rooms has been computerized at 67 stations. The Rooms can be booked on computer terminals placed at these stations as well as on internet through the website www.railtourismindia.com. Currently, booking / cancellation, up-gradation and extension are available in the retiring room application.
Some of the basic features of retiring room application are given below:-
• The Rooms can be booked in advance (up to 60 days) through internet as well as on terminals at stations,
• Based on the booked PRS ticket PNR No. at the Source and Destination stations.
• The facility of booking of retiring room is available only on Confirmed and RAC tickets.
• The Rooms can be booked 2 days in advance based on UTS tickets, Railway Passes and other travel authorities only on terminals at stations.

The list of computerised Retiring Room locations for bookings through internet and terminals is given in Annexure-I.
Annexure
S.No. Location Code Location Name
1 ADI AHMEDABAD JN
2 ALD
ALLAHABAD JN
3
AME
AMETHI
4
ASR
AMRITSAR JN
5
BBS
BHUBANESWAR
6
BCT
MUMBAI CENTRAL
7
BDTS
BANDRA TERMINUS
8
BJU
BARAUNI JN
9
BPL
BHOPAL JN
10
BRC
VADODARA JN
11
BSB
VARANASI JN
12
BTE
BHARATPUR
13
CBE
COIMBATORE JN
14
COR
CHITTAURGARH
15
CSTM
MUMBAI CST
16
DBG
DARBHANGA JN
17
DHN
DHANBAD JN
18
DNR
DANAPUR
19
ET
ITARSI JN
20
GAYA
GAYA JN
21
GR
GULBARGA
22
HBJ
HABIBGANJ
23
HJP
HAJIPUR JN
24
HW
HARIDWAR JN
25
HWH
HOWRAH JN
26
INDB
INDORE JN
27
JAT
JAMMU TAWI
28
JBP
JABALPUR
29
KOTA
KOTA JN
30
KQR
KODERMA
31
KTE
KATNI
32
KYN
KALYAN JN
33
LKO
LUCKNOW NR
34
LTT
LOKMANYATILAK T
35
MAS
CHENNAI CENTRAL
36
MDU
MADURAI JN
37
MFP
MUZAFFARPUR JN
38
MGS
MUGHAL SARAI JN
39
MRJ
MIRAJ JN
40
MS
CHENNAI EGMORE
41
NDLS
NEW DELHI
42
NGP
NAGPUR
43
NK
NASIK ROAD
44
PNBE
PATNA JN
45
PUNE
PUNE JN
46
PURI
PURI
47
RBL
RAE BARELI JN
48
RJPB
RJNDR NGR BIHAR
49
RJT
RAJKOT JN
50
RMM
RAMESWARAM
51
RTM
RATLAM JN
52
RXL
RAXAUL JN
53
SBC
BANGALORE CY JN
54
SC
SECUNDERABAD JN
55
SML
SIMLA
56
STA
SATNA
57
SUR
SOLAPUR JN
58
SWM
SAWAI MADHOPUR
59
TNA
THANE
60
UJN
UJJAIN JN
61
VSKP
VISHAKAPATNAM
62
BSP
BILASPUR JN
63
R
RAIPUR JN
64
G
GONDIA JN
65
SGO
SAUGOR
66
MYR
MAIHAR
67
SMBJ
SHRI MAHABIRJI

Spot booking means "No Booking' as Babus are not interested to findout what is 'unbooked' as on date and they also have got excuse to refuse , as some 'insider may come suddenly so better to keep some space for them.."
Best answer they give is 'Online booking" , no vacancy ...
I have seen one passenger was refused a Room on this pretext...
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this /blog/post/1748309 for more opinions