Sorry, that Cornell blog is a little confused. here is an extract from the abstract of Davis and Lineweaver:
"We show that we can observe galaxies that have, and always have had, recession velocities greater than the speed of light. We explain why this does not violate special relativity and we link these concepts to observational tests. "
So the reason that we can observe galaxies which are moving away from us faster than the speed of light is not, as the Cornell blog asserts, because "the galaxy was not moving faster than the speed of light at the moment the light was emitted".