Found that my stats were extremely inflated and now I finally figured it out. It seems that CrawlTrack also tracks hotlinked photos and favicon.ico loads as a unique visitors. this is not correct behavior because favicon.ico could be loaded by browser when people check their bookmarks and well hotlinkers watching photos on other site than you could inflate the stats extremely.

To verify if the visitor is really a visitor some check needs to be added, perhaps check the content type or if also page that the images were on gets loaded or maybe referral? Don't even know what to suggest in here really