Back in "good old days" the WPP 30 days showed the same numbers that GA did show
Of course, I wouldn't have made that modification if I knew that. Unfortunately, a long time had passed before I realized what the problem was. WPP 3.0.0 could have been released months ago actually, but I decided to spend a little more improving the plugin and making sure old bugs were fixed for good.
Anyways, this is why the statistics were not that accurate. Unfortunately, what WPP has registered prior to 3.0.0 can't be corrected so old stats (weekly, monthly, all-time) will still reflect visits from bots.
In your case, however, something's odd. There should be more visits on WPP than on GA. You're reporting that GA is actually displaying more views than WPP does. Are/were you using a caching plugin, by any chance?
A long post, I know. If you actually read all that, thank you for your patience hehe.