I'm having the same problem.
By my calculation the click-through rate reported via ad-minister is approx 10-15x what it should be. As my links are for affiliate sites I can check on the affiliate platform the number of referalls they say I'm sending through. They're nowhere near what ad-minister is reporting.
To test, I've clicked several banners then refreshed the stats page on the affiliate platform the click is counted so I know that part it working okay. Which just leaves ad-minister counting clicks that aren't clicks. I'd be surprised if there are that many bots on my page?