I am trying to create a filter that displays all of the people that I have not emailed or called in the last month.  My plan was to use the activity and create a filter if nothing has happened in the last month.  But it does not seem to work either with activity or email.  See picture below.  

This filter is still showing someone who has been emailed just a couple of days ago.  Do you see the error and why this would be the case?  I seem to be having a lot of issues with filters in pipedrive actually working and would appreciate it if anyone knows of any good resources as well.