Yes, the same thing happened to me last week. Between Friday and Saturday (September 26th and 27th) my Total Page Views Ever DECREASED by 2,418 page views. My one day views were almost 4,000 for that 24-hour period.
The same thing happened to someone else: http://hubpages.com/forum/topic/125271#post2644724
I sent an email to the staff, didn't get a reply, so I sent another one. I just received this answer today: "Our engineers are working as hard as they can to fix the statistics updating issue. We appreciate your patience."
However, it is not an 'updating' issue. The stats were updated on September 27th and the total views decreased. Stats updated again since then, and those views were never recovered. Now, of course, I'm wondering how accurate the income figures are since they are tied to page views.
This probably isn't the answer you want to hear, but it's the best answer we have right now. So, you can pick mine as the best answer! (Joking, sort of.)