For a split second last night we appeared to have leaped 4 pages up the search results, to a magnificent No2. But this morning we have not moved from our original slot. I have checked webmaster tools and it appears that our old data is still being crawled, or at least old keywords are being picked up. This means none of the new pages are being picked up for now, but how is it that for a brief few hours all the site updates appeared to be working and we lept to No2?
This will require a little research but it looks like some kind of Google SEO search bounce. google really does like to keep you on your toes.
One explanation is Google personalisation is producing a false listing, which could well explain the bounce.