Rating of First Shift from Uwe Boll

I just watched First Shift from Uwe Boll and saw the average rating here of 4.5 Stars. So I wondered, because that Film is a blast! When I go for the detailed ratings of that Film, I see much better ratings and an average of 8.4 Stars. How is that possible??? Please get that thing right! Independent filmmakers have to be treated better! Best regards