We have verified the dashboard activity related to your account(s) and we do not see anything problematic with the reporting.
I see there is another post created for the same issue. The account used there seems to be different but we have checked the logs and there is genuine dashboard activity that corelates to the ops calculated and reported on the dashboard.
As mentioned in that post, there is detailed, step-by-step walkthrough of how the dashboard queries the database. Mysterious Shell Read and write ops - #2 by ptpaterson
Thanks!