Unless you are concierge or sailing from outside of the U.S., your PIF date is 75 days out like everyone else. Both of you are being told when your TA would like you to pay, which is not the same as
DCL.
Stimize, have you checked your reservations online at
www.disneycruise.com? I have to wonder if you are actually booked on the same cruise. I have known it to happen before that a TA booked family members on two separate cruises in error. If you are on the same cruise, unless one of you is in concierge, your PIF dates are the same.
Now, your booking window could be different if either stateroom has a returning cruiser in it -- which would require you to be PIF in order to be able to book reservations, spa, Palo, etc at that point.