Odd Google AdSense and Analytics Behaviour the Last Few Days

I get daily reports on our Google AdSense channels as well Google Analytics for the SpaceRef network of sites. The last few days have seen some strange disconnect between the two. Google Analytics is reporting a surge in traffic, in particular to a couple of old stories.

Today it's reporting that a particular story which is 4 1/2 years old has generated 21,000 pageviews. The referring traffic indicates it's organic from Google and for a particular keyword phrase, "first laser", which is coming in 14th and on page two of Google results for the phrase. Yet when I look at Google AdSense the channel data suggest that traffic does not exist.

So which is right and which is wrong? I'm leaning to a problem in reporting from Google Analytics. It's only recently that for some of my larger sites I've switched over to Google Analytics and I'm wondering if I did the right thing?

I wonder how many other people are experiecing the same problem.