Hi Marlon,
I don't see any issues in your formula and
hope you understood how count function works.
If you want to display the count of only distinct values you need to use your formula
=Count(Chrono Date]) In([Poe Type])
But if you
want to count the duplicates also you need to use 'All' in the forumla like below.
=Count(Chrono Date];All) In([Poe Type])
I hope this helps.
Sampath