I've always considered that the Cylon robots rebelled against the biological Cylons, much like a Terminator or Matrix movie. As a result of their encounters with their creators they might have a dislike of all organic lifeforms. (I have no backing for this just a personal opinion.)
As for the moon landing transmisison I've usually viewed that as if the signal had traveled years, possibly even a hundred years or more before the Galactica picked it up. For me the Earth would be more advanced when the Galactica and her fleet finally arrive, possibly in the year 2100-2500.
Just my $.02
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