Or another way to confirm the unique number of players, since I had to download my game a couple of times myself to test, etc. I'm not sure how to read these numbers accurately. I tried to search the Forums for this, but wasn't able to find it. 

If you're logged in while seeing your game pages or downloading files, those shouldn't register. Of course, if you're trying to test if people can download without an account, that's another story. Either way, I think the stats you see are about all, unless you use your own Google Analytics ID. There are some hidden options, but they only change the presentation.