Went ahead and re-booked online with the discounts and will call back later and cancel my existing reservations. I don't have time in the next 5 1/2 days to really sit around and wait for the system to come up to modify, if able, or have to cancel and rebook.
Edited to add: I saved $288 on 6 day/7 nights at Pop with 1A/2C (11 and 13). Probably saved ~$200 on my parents reservation, 2A, same time frame.