On 2.17.1 ( But both of these occured on 2.16
Why is the dashboard still showing expired policy even when it has been completed?
Also, Future tasks is showing duplicates.
Yes - this is something we planned doing and did not because dashboards brought a huge amount of complexity we did not expect and as you will see today (another hotfix) we are still fixing 
We have the code done that “removes” an item from the task (and calendar) when is not “expired” (and one must be careful as there are many things other than policy reviews that can be expired shown on the task list). Next week it will be published.
Thanks for the quick reply/update.