I thought that was odd too. Maybe the middle one was a practice swing?
edit - I watched it again more closely. Looks like he threw down the second ball and the middle shot was either a practice swing or he missed it altogether and it wasn't counted (which I think is fair given he was wearing a thick space suit in low gravity swinging one handed with a fishbowl on his head).
edit 2 - Just seeing child post. Guess I gotta watch it again :)
edit 3 - Yep, child post is correct. It's sort of weird how confusing this short video is. The second ball kind of appears out of nowhere, as if he was doing a practice swing and dropping the ball at the same time.
A ball is clearly visible at 46s. Watching it again, he swings 4 times. I don't see a ball for the second swing, but they are clearly visible for the other 3.
I imagine the analyst found where 2 landed and the write up misunderstood that to be the number of shots.
He also has little trouble with the mechanics of the shot that he is able to take with the suit on.