Oh dear Facebook executives, a few weeks after “videogate” you are admitting more measurement errors. Wasn’t it enough to have GroupM call your artificially inflated video metrics “careless and unfortunate”? Well, yesterday Facebook admitted to the media buying community that it had uncovered a bug in a Page Insight dashboart that overstated the 7 day reach of a Facebook page by 49% and the 28-day reach by 122%. The paid reach has not been impacted by this measurement error. Below excerpts of the Facebook announcement.