Please see here -
http://wordpress.org/support/topic/jetpack-wordpress-stats-showing-incorrect-count?replies=27
A whole bunch of people are reporting that site stats have disappeared - including from my site. The 'At A Glance' histogram appears ok but all the other data has reset.
There also appears to be a possible connection to where people have dormant other websites - i.e. is jetpack pulling data through from wordpress.com for the wrong website?
thanks
Lucy
Blog url: http://laybackandgetrich.com