I recently got some data in the SEO section of my GA account by adding Webmaster Tools for my site. There are 3 subsections: Queries, Landing Pages, Geographical Summary. I would expect that given the same date range, the grand total Impressions number in all 3 of these categories would be identical. However they are not. What would explain the difference? Queries is a flat line, total impressions for last 7 days is 15. Landing Pages looks more like a bell curve, Impressions min=0, max=50, total=108 over a 4 day period for the last 7 days. Geographical Summary shows a similar bell curve to Landing Pages with same min and max, but total Impressions = 222. Shouldn't they all be either 15, 108, or 222? Why aren't they? Thanks.