I have found that the "how many looked' number includes how many time you actually looked at your own topic to see the replies. I thought the same thing you did for a while, how come so many looked and didn't comment. But when you consider that number is not just an indicator of different lookers, but includes repeat lookers who look back to see other posts etc.
Their should be a way to have it so that when you check your own post it doesn't count.