Jason,
I'm sorry, but that's not how PMI's PDU reporting works. PDUs are earned on the day of the activity and not on the day you claim them. So if you take an 8 PDU course today, then you have earned the PDUs today and they are assigned to the current renewal cycle. And even if you wait to report the PDUs for 2 years, the system will still assign the PDUs to today and the current renewal cycle.
So the PDUs you mention are earned in the current cycle and PMI does not allow you to apply them to a future cycle. Sorry.