Odd for them to shift the times around like that, but it makes sense to air it at 10:00 when they did. They should continue to show it at 10:00 to maximize their viewers, but I believe they are doing a Talking Preacher type show afterwards, which may explain the earlier 9:00 time slot.

They should have just show the pilot after Memorial Day weekend to avoid confusion as well since they are going to show the second episode during the first Sunday in June and not this weekend coming up.