I'm having a hard time understanding non matching data in Google Analytics.
When I view unique visitors, and press the PER DAY resolution, I get a pretty steady picture:
Although, if I click the PER WEEK resolution, I get this sudden drop:
I've even checked the export option, and the SUM(DAYS) just doesn't add up to the WEEK stats. Does it calculate what is considered a 'unique' visitor differently according to time span(day/week)? Has anyone else seen such non-compatible patterns, or has any explanation that might shed light?