Just for the record and for anyone needing this in case they want to reschedule their NASS, I was accepted to the NASS Session 2, which is the same week that I will be attending the WPSLE Session 2.
I received my acceptance on Tuesday, emailed them about an hour after receiving the acceptance, and was rescheduled for NASS Session 3 by Thursday. When requesting and receiving a subsequent session transfer, one is prompted with a new due date for payment so that they have another 7 days to complete the paperwork and payment.