Keep these advises in mind when filtering :
Filtering on Checkbox Fields
When filtering on checkbox field, use the following terms in the “Value” to specify if the box is checked or not :
True = CheckedFalse = Not checked
Let’s take for example that you want to see all the leads who have read your email.
To do that, choose the Field “Email Read” in the drop-down list, then select the “Equals” Operator, and finally enter “True” in the field Value.
Filtering on Date Fields