[StoutSnout]

I recently went through this (resolved this AM) after picking up my new ZL1. I believe the problem was related to how many devices were programmed. My garage door opener has a limit of 7. After that, any new devices will result in the last programmed device being cycled out.

I resolved by clearing out all devices from the unit. I held the learn button for ~10 seconds (until the light went out). Then programmed two remotes and two cars and everything works.

Hope this helps.