Attendance Filter Function Not Displaying results correctly

Hi,

Previously i had some help on here to enable a filter function using drop down menus on my companies attendance tracker. (worked perfectly)
Since then i have revised the tracker and found new ways to make the workbook neater,cleaner and smaller, while also retaining its functionality except one the previously working filters.

The filter works perfectly for the shifts only.
If i select either Position or Department filter options all i get is the same employee displayed regardless.

Any chance someone can take a look at my attached file please?

If you can explain where i have gone wrong as well that would be great so i know for future reference.

Thanks
Mark