Dear aspirant

I am afraid to confirm you that not only in WBJEE counselling , rather in every counselling you will be allotted only one seat that is for the  case of WBJEE one only particular department of a particular institute or college . So it is not possible for a candidate to get more than one college in one round . During choice filling you can put any no of choices there and sort them according to your favourable interest . In every round you will be allotted only one department of one college . According to your sorted choice list the top most available choice with vacant seats will be given to you . If you are happy with that then you lock that and get admission . Otherwise you upgrade. If any of the preceding choice's  seat  becomes vacant then you will get than otherwise you get the allotted seat given to you from the previous round. That's how it works. So choice filling and seat allotment is very vital.

You can't get 2 or 3 colleges . By your rank many departments  of many colleges can be available to you but you will given that particular department of that particular college which is in higher position in  your choice filling list.

Best Wishes.