Please go through the train details properly before posting any comment. S8 S9 & B3 are slip coaches which will come from BZU and will be attached to the train at AMLA.
I know that the concept of slip coaches is no more now. I have made this train many years ago and that is why slip coaches arrangement was don for BZU as there was big demand for Mumbai train from BZU
And one more thing, there is no B4 in this train.