Dadar/Pathankot Express - ਤੇਰੇ ਬਿਨ ਮਰ ਜਾਣਾ

IRCTC booking query .
I need to book 1 ticket from LJN to BPLin train number 2533 in 3ac on 11th oct in Lower berth quota. As I am above 45 year of age and traveling alone so I am eligible for this quota and also it is showing 1 seat available . But when I am going to IRCTC it is not showing . How I can book ticket in irctc for this seat. As far as I know SS quota is availble for booking in irctc. But after this beta version we are unable to go to book page in plan my travel as there is no booking link
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2926A train number is not coming in irctc search when we search between NDLS to BRC . This site is showing 5 seat avl for oct 1 between NDLS to BRC in general quota . But when we go to IRCTC to book this train ticket this train is not coming under search. could some one explain why it so.
Why 8601 train is not coming in search in irctc when we search between NDLS to JAT
This train has AV on oct 6 as per this site between ndls to JAT but when we go to irctc this train is not coming at all between NDLS to JAT. How to book ticket online for this train .
Any expert who can give me idea how to book this tickets online.