BCT8 programming issue

How do i delete a programed trunk tracking bank? i program one frequency in and now it will not let me change it so i can add the rest.

As far as deleting a whole bank you can't, If it's replacing a frequency you added on to it, Find the new frequency you want to put in, Hit "prog", and then go to the one you want to delete. It will write over it. At least that is how my T7 is.