Dashboard display inconsistent information

Since v4.0 October has some nice looking traffic statistics dashboard in the admin area’s front page. But the information my dashboard shows is not easy for me to understand, because it is significantly different from Googla Analytics dashboard also attached to the same website. A few examples:

  • For a certain date, OCMS Dashboard shows over over 300 visits and over 200 unique visitors, wile for the same date GA shows 0 visits. This is even more surprising knowing that (at least according to GA) my website rarely receives more than 10 visits per week.
  • For a different date, OCMS Dashboard shows 0 visits, while GA shows 2 visits. The same difference then repeats for 3 different dates.
  • Slightly related: I empty bad requests log (reset to 0), and wait for 1 day. After a day, OCMS traffic dashboard shows 0 visits, but the bad requests log shows over 13.000 bad requests.

How are any of the above situations possible? Looking at them is making me doubt OCMS traffic dashboard’s accuracy and reliability.