Have these been delayed? Notice the TBD for the Omaha date it used to be 10-28(you need to click on Omaha to see this)
Maybe they are adding a second one?
The main list also says "Waiting List." If you read the red text that appears when you click Omaha, the reason it says "TBD" is because the existing event is at capacity; they're taking names so that when they figure out what to do, they can contact people who didn't make it onto the list for the original event before it filled up.