Why am I not getting any of the OTA updates after 6.0.1 (MTC20L)?

[ahfu25]

There have been 3 updates since 6.0.1 (MTC20L) and I havent gotten any of these over the air. I've had to update manually but I have to reset my phone and start from scratch. Is anyone else having this issue and is there a fix?

 

[joooe]

Update builds without losing data:
http://forum.xda-developers.com/nexus-6p/general/guides-how-to-guides-beginners-t3206928

STEP 9