There's no mix up. Think about it, if God ask you to kill someone, you only have two possible options to choose from, yes or no.
You either obey the command or you don't.

If you choose yes, then your saying "Yes God. I trust you completely and will follow through with your instructions. I have complete faith in you."
If you choose no, then your saying "No God. I don't trust you have made the correct decision. My decision in not doing your request is the correct one, so I know better."

There's no other options to choose from.