We are having the same issue. Our pack is in Fishers, IN near Indianapolis and we are on Eastern time. The Pack profile has (UTC-05:00) Eastern Time (US & Canada) and our first reminder comes out with the correct time but for some reasons it shows CST:
When: Dec 6, 2020, 7pm - 8pm (UTC-06:00) Central Time
Subsequent reminders will adjust the time automatically and update the timezone designation causing half of our pack to show up an hour late:
When: Dec 6, 2020 8pm-9pm (UTC-05:00) Eastern Time (US & Canada)
Thanks,
Jonathan