[Plugin: Jetpack by WordPress.com] Jetpack Stats empty for Sept only

When I look at my stats through Jetpack, the month of September is empty. The month before had 100 visits, this month I am at 292 already. September was very busy as well – could have been over 400. Why is that month empty in all views? My other stats from my hosting company are very different and they put September at an all-time high for me. Any ideas?

http://wordpress.org/extend/plugins/jetpack/