I wrote an article about Adsense Ghost Clicks and I found 6 reasons that can you bring these kind of clicks. Do you know any other reason?
Be careful, your AdSense placement is against the TOS. You can't put ads right under "Related Articles".
I have also read that you can only place them under "sponsored links" or "advertisements" but actually I don't believe that it's against TOS, because there are really the "Latest Articles". It's not that I wrote "Latest articles" and put only Adsense under it. So it's NOT against TOS. Anyway I will contact Google tu be 100% sure