This is only applying to a couple Macs so far, this policy has been working for most of the Macs its been run on. My Yosemite policy is scoped to a smart group and set as self service. It only becomes available if the Yosemite installer has been cached on that user's Mac.
So in these couple cases, when the user clicks the Yosemite button in Self Service, it does its thing, and it reboots, but then it goes right back into 10.9.5. It's not booting to the OS X installer to finish the Yosemite install. I experienced this on my Macbook too, and it took 4 more install attempts via self service before it actually booted to the OS X installer and finished the Yosemite install, and now I'm hearing from somebody else who is having that issue. There is no rhyme or reason that I can see.
My Yosemite install policy is set to reboot if installer requires it, and it's also set to boot to OS X Installer, and to install from cached. I know the policy works because it's worked for most of the Macs it's been run on so far. Does anybody have any idea what's going on?

