Other mistake: When Marcus, Kyle and Star are at the petrol station, a flying HK and the giant Harvester robot are able to appear just outside without making any kind of sound. In every other scene of the Harvester and the HKs however, they both make an incredible amount of noise. (00:37:40)
Other mistake: A spelling mistake in the credits lists Diego Lopez as a "soilder" instead of the intended soldier. (01:27:45)
Other mistake: The T-800 manufacturing facility cannot seem to decide just how the T-800's are assembled. When John, Kyle and Star jump through the hole and land amongst a load of T-800 skulls, all of the skulls have eyes that are lit up, and the lower jaws already attached. However, in the next shot when we see the T-800's being assembled on the production line, eyes are inserted separately and are not lit up, and the the lower jaws are only attached at that point, not before.
Chosen answer: We are never given any direct indication that they know Reese's importance. They don't appear to know that Reese is Connor's father. They are merely using him as bait for Connor. They must know that John is interested in someone named Kyle Reese and figure that news of his capture would bring them the man they really want.
Garlonuss ★