Amen. Please notice the number of pages that Google claims it has indexed for a keyword or phrase. These also vary from time to time and go DOWN - not just up.
Checks from different places in USA give different results for a site that should not be localized. Sometimes one page is main and another is subsidiary (indented) and sometimes the opposite - for no apparent reason.
They seem to be experimenting with different algorithms in different places or different servers.
It may be driven by link popularity.
Google Top 1000 SERPs checker: results many countries Google Pagerank SERPs index results web SEO tools does not appear to reflect what people really see when they do a search - check it out.