I wouldn't say so. Are your ads in the 300x250 ad blocks? or bigger? is it an MFA site? Perhaps the person that clicked the ads checked out each of those sites, the time interval is about 30sec-1min so they could have seen whats on the advertisers page, not like it and hit the Back button to your page again. Then again I'm not 100% certain.
i see that somebody has clicked your ads more than one times . i think this is not a ban reason , if you dont try to cheat from adsense