Interesting mistake in FSM

I was browsing through my 1968 FSM and under Windshield for the CJ3B it states, "A stationary type windshield is used on all vehicles equipped with soft or canvas tops. A hinged ventilator mounted in the center of the panel directly under the glass is provided for ventilation." That edition of the FSM covers the CJ3b and up. Looking in my 1965 that covers the earlier models also it specifically indicates that the CJ3A only had the vent. Interesting editing mistake.