Indian Railways — Berth Allocaion

Address:	Sonipat, Haryana, 131001
Website:	irctc

A the time of booking of railway tickets from delhi to Varnasi in Garib rath( train no 22408 ) using "irctc" website, there was no option of mentioning "side middle berth" as a preference. But after making payment, I was allotted "Side Middle" berth.
May be some fault with their web application. But this is unjust as I have to cancelled the tickets and have to re book in some other train.
Please the consider the matter seriously as such arbitrary action creates inconvenience and mental tension.