Yeah. Sure. My guess is these machines were (perhaps part of) the contingency plan if Murphy looked like he was losing. If Jack were ahead at the end of the day, dump those "votes" (from Democratic areas) in to push Murphy back over the top. Someone screwed up and they became known even though they weren't being used.

Of course, there's also the possibility that there were other such "votes" that were added to the total, but sadly it's possible Murphy won for real.