You will not lose the ADR's that you made. They will remain for the dates and times that you originally booked them for. However, it sounds like you are asking if your dining reservations can automatically be moved to accommodate your new resort reservation dates - the answer to that is no. Resort and dining reservations are separate, so if you now want your ADR's to shift to your new dates, you would have to cancel out your original ADR's and make new ones.
For example, if you made Chef Mickey's for 10/3, but want to move it to your new check-in date of 10/1, you would have to cancel and re-book Chef Mickey's OR you can simply leave Chef Mickey's for 10/3 and, perhaps switch your touring plans around to accommodate the ADR's you have already made.
Hope that makes sense.