Duke can certainly require you to withdraw your applications from schools where you have already been accepted. Asha is talking about schools where you haven’t yet received a decision.
I thought LSAC sends out a notice around mid may to all the schools about deposits and double deposits. So, you are better off withdrawing other acceptances once you have deposited.
That was just your impression - she is saying that you cannot, as a condition for accepting a seat in a class or a scholarship, be require to withdraw your application from a school which has neither accepted nor rejected you.
If there’s a school that you would attend with a scholarship over Duke, I’d give them a call and tell them that you have a deposit deadline coming up and that you were hoping that they could expedite your financial aid decision. If they are unable to do so, you might want to try calling Duke and asking them to extend the deadline.
I would call the schools you are waiting to hear back from and explain the deadline. Hopefully they can give you a quick turnaround. Duke’s deposit is on the 26th.. you can still get an answer by Tuesday and fedex the deposit .