Double transmissions... twice!

At 1000z a message for 570 (a relatively rare call) was sent from two transmitters (?) in AM and USB mode nearly at the same time! Listen what happened, as recorded in USB mode. Three persons were involved! The OM with the deep voice, then the OM in USB and his companion who read the message.

At 1029z the same thing happened for Agent 995. Here's the clip, recorded in AM mode this time.

On both cases the OM with the deeper voice started earlier, in AM mode and with the annoying 1000 Hz "test" tone.