Well I have done a little research, but what I found was that when you top correctly, two nodes grow back instead of the one. In this case, the stalk was cut, but didn't grow back and growth was directed to the other nodes that had already been growing.
If I top correctly the tops that can be topped, how long will it take the nodes to grow back and be ready for flowering, because these guys are gettin close, I'd just like to maximize yield.