Bowden's BCD clock circuit

I've decided to build a BCD clock and after searching for a circuit
I've decided on Bill Bowden's circuit.

http://ourworld.compuserve.com/homepages/Bill_Bowden/clock.htm

After examining the circuit, though, I'm curious about the circuit
giving a pulse every second. There are two NAND gates attached to the
4040 binary counter which then feed into an OR gate. Am I correct in
assuming that they should be feeding into AND gate to get a pulse
every second? As the circuit stands, I would think it's going to give
a pulse on 0.8 sec and on 0.2 sec, or two pulses per second.

I'm fairly weak on logic circuits so forgive the stupid question.

Greg
.

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