Posting a sample sheet would have helped ( no pics please). We now can only try guessing. As for your dates, the format might be correct but are they real dates? YOu van verify this if the dates are right-aligned in the cell when no manual alignment is applied

__________________
Using O365 v2503 - Did you know you can thank someone who helped you? Click on the tiny scale in the right upper hand corner of your helper's post