Troubleshooting step:
-Verified there is no rogue dhcp server.
-Verified settings on DHCP server.
-Conducted packet captures of controller uplink and server.
-Enabled enforce dhcp, fast age and deleted all users from user-table.
-Rebooted all controllers
-Checked global timers
-Active ticket w/ Clearpass, controller and our core router.
We are still having the issue. Yesterday I opened a ticket w/ Clearpass and they noticed two different ip's for a single user. The accounting packet was different that what the user had. According to them the controller was sending the wrong accouting packet. After noticing this they spoke w/ controller engineers and explained there is a "bug" in 8.3.0.8 that could be causing a problem. Something to do w/ openflow. The frustrating part is the previous day I had a conference call w/ escalated Aruba TAC support, they saw the issue and not once mentioned anything about errors w/ the code. I understand things don't run in a "perfect world" but communicate to your customers and being honest goes alot further in building trust and quality relationships with your customers.
I will respond back once we figure out a solutions