As I recall, this is simply QlikView behavior. If there is only a single value for one of the fields in the drill down, it drills down further. What information is there to be gained, after all, by looking at the exact same number again? To actually drill down usefully, it has to take you to where there are multiple values again.
It seems you want to make the users go through additional clicks to get to the same information. What would be the purpose of that?