Well it might just be not very inaccurate. Did you see what those sites are? Also, it's extremely unlikely, but someone might be using your pub-id somewhere else.
Well, if you go to adsspy dot com, you will see what it's all about. It basically asks for a domain name or google adsense pub-id, and from that information tells you where else that pub-id is being used (for a fee).
I did't see those sites because if I wan't to see I must pay , but I also ask on seoquake forum but no answer. for what reason someone might use my pub-id somewhere else?
Like I said it is unlikely, but they might be trying to get you banned by using it on non-adsense-approved sites. I'm not sure what sort of measures google takes against something like this.
In your adsense code: <script type="text/javascript"><!-- google_ad_client = "pub-XXXXXXXXXXXXX"; ...