Operator Prompt Confirmation/Verification Signatures

Hello,

I have configured an operator prompt to require a confirmer and verifier signature by setting REQDATA3 = 1. However, I have noticed that the prompt is acknowledged when the same person signs for both roles. 

As I understand from this thread, the ability to sign for confirmer is tied to function security BATCH_ACK_PROMPT, and the ability to sign for verifier is tied to BATCH_ACTION_VERIFY. If a supervisor has the key for both of these functions, they would be able to sign for both roles. Is there any way to prevent this? The desired behavior would be that two people with the BATCH_ACTION_VERIFY key would be required in order to acknowledge the prompt, with neither being able to sign for both roles.

Any advice would be appreciated, thanks in advance.