System installs Big Sur Beta 3....but doesn't.

I have Big Sure Beta 2 installed, it tells me I have a Software Update for Beta 3, I tell it to go ahead, it spends 50 minutes doing the update, it reboots, it reboots...it says it is updating...and after that....it is still at Beta 2. I have even reinstalled the Profile. So, that is weird... So, how do I force an update to Beta 3?