From what I can tell the 2 side shoots are still intact. The idea is to leave the 2 side branches and pinch off the upward growing node. I usually don't top until the side branches have poked up a little bit. You will know if you screwed it up when nothing grows from there, or some deformed crap shows up.
I've botched topping twice when I was pretty new. Once I pinched too much and only one side branch grew out, and the other time I pinched way too early and nothing at all grew out.
There are several tutorials on youtube that give you a close up view of the process. Id suggest checking them out.