Complex sentence: The convoy is delayed and does not move out due to a confusion in who is signalling whom so the prisoners can be loaded and it turns out delta were waiting for the convoy to signal them while the convoy were waiting for delta to signal them.
Split into simpler sentences: The convoy is delayed and does not move out due to confusion as to whom is signalling whom. It turns out delta were waiting for the convoy to signal them while the convoy was waiting for delta to signal them.