Exactly ... you will get it
And otherwise on this rout there are many foringer quota which would fix the issue!
The route Dehli - Agra - Varanasi - Kalkuta is so well prepaired that as a tourist you will not have to wait for a week. I am writing this just for some people which will come to this topic later on, you are don with your waiting list ticket RLWL1, this is for sure
And there is a bad sulution for worstcase situation as you have a ticket you can bord the train bud have to sleep and travel on the floor, hehehe, expect from nights is ok, at night is quite hard ..... trust me