Windows 10 Creators AutoLogin Count
It seems Microsoft has addressed this issue with KB4022716 (OS Build 15063.447).
-Addressed issue where, if you specify an auto-logon configuration in Unattend.xml, auto-logon only works on the first logon, but will not work again when the device is restarted.
I installed Windows 10 Enterprise 1703, updated to KB4025342 (OS Build 15063.483) via. windows update. Did a sysprep, captured the image to k2000 and tried out the deployment.
Autologon now works again with the specified amount of autologon set in the unattend.xml file, so basically the fix is just to update to at least Build 15063.447 before doing the sysprep.
Hope this helps someone.