Not able to add Approved, Denied, Reminder and few custom email templates to custom approval policy

Hello All,

I created a new custom approval workflow and few custom email templates (Request, Reminder, Approved, Denied.....)

So now while i am tagging my custom email templates to my custom workflow, i am not able to see my custom email templates to the respective fields in approval workflow.

Where I am able to tag my custom email template(Approval required) to Approval required field in my custom workflow.

But i am not able to tag Approved, Denied and Reminder custom templates to my custom approval workflow.

Could any one explain why i am not able to tag them?