Only party tracking data

This weekend I moved my blog from blogger to wordpress, but I kept my own domain (http://www.mysimplyspecial.com). I installed the Google Analytics plugin, but now its seems to track only part of the traffic. Both Jetpack (installed yesterday) and Statcounter (installed right before of after Google Analytics) show numbers that are in line with the history of my blog.

How can I solve this?

https://wordpress.org/plugins/google-analytics-for-wordpress/