You don’t join a main bracket until you select an end time. The amount of people in your bracket should be in a red band above the black band that states how much time is left in the event. It is easiest to just check the last post in the thread, to see what the latest info someone has provided. If the time zone settings in your user profile are correct, you should be able view the time the person posted, to see how current their info is. There is a possibility of multiple brackets filling side by side, so join a “fresh” bracket at your own risk.
Useful info to provide
1)Time slice you are in
2)Current amount of people in bracket
3)Leader in bracket with amount of points
4)Time you joined the event, if it was not right before posting in the thread.
Time slice - _______
Current bracket - _______ people
Leader - _______ (name) / _______ points
Full bracket = PLAYERS: 1000
And from Mags1587’s awesome guide:
[spoiler]Episode 6: Enemy of the State
Length of Event: 6.5 days
Sub-Events? Yes; Alliance Rewards in Sub-Events? Yes
Number of Sub-Events: 6
Length of Sub-Events: 36 or 24 hours
Main Nodes after Sub-Events End? No
Unique Reward(s): ???
Other Notes:The first sub-event is 36 hours; all others are 24 hours. One sub-event runs at a time. There are Main nodes to open up the sub-events. These nodes are one time only nodes. This event introduced "Survival Mode". This is a node with waves of enemies. The number of waves per node and number of enemies per wave varies. Points are gained after each wave.[/spoiler]