And it makes sense to only move the two engine mode switches at the same time to prevent the situation of trying to take off with one at idle and one at flight - it's happened many times in the past, and will continue to happen unless you have the discipline of moving both switches at the same time.
I agree! However, you are probably aware that there is an optional mod kit available to help prevent this happening; it gives an audio warning if the collective is raised in a "single engine" configuration.