Well sure, because by that time, Kyle was his father. Reese going back to 1984 and getting it on with Sarah wiped her original son John from a different father from the timeline.That's tough to support going by Cameron's scripts. Granted it's merely implicit in T1 that John knew full well who Kyle was when he sent him back, but in the T2 script it's explicit.
Whatever. As Hawkeye said, None of the Makes Sense anyhow.
