Also, when I checked to see where it's all coming from it's saying a good portion of it is from the USA, but a large chunk is from "Not Set".
I ran some content discovery ads earlier this month to two of the sites, but that doesn't explain the rest. Also, the traffic from those ads far exceeds what I paid for.
I'm not an Anaytics expert and have never seen anything like this. The only thing all the sites have in common is the plugins used, one of which is the Google Analyticator plugin.
Any thoughts would be appreciated.