Try sending a DM with the same questions to the Hyatt Twitter account. I've had good responses from that team. I talked with my Concierge a few weeks ago and asked about the difference between MyConcierge and Hyatt Twitter and was told they are two separate teams.

The SLA response time for MC is 24 hours while the Twitter team seems to respond in under 1 hour. MC told me that they are to be used more for setting up future reservations and more complex travel arrangements while the Twitter team is for ad-hoc questions.

Try the Twitter team to see how they respond.