Can I create a Configurable Delete Role?

I want my users to be able to delete a task for a request but not the entire request itself...they have to go to an Admin to do that. Is this possible?

Under the Role tab, in the Advanced Permission section there is a check box for "Deleting Request Task" but when I check that, it also checks the Delete checkbox on the Request line of the Access Permissions section. I don't know if this is intentional or if there is a bug and both check boxes accidentally got named the same thing....so, when you check one, you are checking both. I've made that mistake before...when I was first learning how to code. SO, I'm assuming this is intentional but that makes NO sense. Please help me here.

Thanks,
Mike