Please help me understand why number of visits, number of visitors of all my websites reduce about 2 time after upgraded to version 2.x? Below is the data table of several days showing that visits of a website counted by version 1.12 is higher than version 2.0.2.
I used Google Analytics to check again the data calculated by Piwik. It shows that the data of Google is equivalent with data of Piwik v1.12. It means that the data of v1.12 may be the correct one.
But data calculated by Piwik v2.0.2 is only about 1/2 of Piwik v1.12. The configuration file is the same (I didnot change anything in config.ini.php).
A in the table below is Piwik 2.0.2, installed on machine 1 (it is a upgraded version of Piwik 1.12 to 2.0.2). B is also Piwik 2.0.2, installed on machine 2 (B is a fresh new installation of Piwik 2.0.2). C is Piwik 1.12, installed on machine 2 (C is also a fresh new installation, but of Piwik 1.12).
As you can see, number of visitors (or pageviews) of A and B are nearly same (I wonder also why they are not equal?), but A (or B ) is only about 1/2 of C.
What’s wrong here? Is there any changements in the way that Piwik 2.x calculates the number of visits/visitors?
Date A (Analytics 2.0.2) B (v2.0.2) C (v1.12)
visitor pageview visitor pageview visitor pageview
30/12/2013 31292 50860 30057 51945 56200 96328
31/12/2013 29598 46425 28418 47870 53045 89692
01/01/2014 26110 40631 25221 42117 47439 79502
02/01/2014 6304 8911 6144 10317 11036 19024