basically, here is a timeline to assist in showing hwo this all work, as many people seem confused!
[rego' open!] - - - - - - [Confirm's open!] - - - - - - [Confirm bump!] - -[Event!]
What the CONFIRM BUMP is, is when all the people that have NOT confirmed, drop BELOW people who HAVE confirmed.
eg: before bump:
CODE
Tank Confirmed
R4n Un confirmed
Mini Confirmed
right? so theres a whoooole bunch of unconfirmed people in amoungst the confirmed players. at the point in time, the list is sorted to REGISTRATION date, not confirmation.
PLAYER BUMP! WOO!
CODE
Tank Confirmed
Mini Confirmed
R4n Un confirmed
The list is STILL sorted according to registration time! just that everyon NON CONFIRMED drops down! so all the confirmed players shuffle up!

That's why all of us admins/uber gophers keep telling you all to wait for the BUMP! to consider arriving or not. If you're still super dooper worried, PM me and i might give you a phone number to call on the day.
i hope that finally explains things!
-Tank
ps, the player bump will happen in a few days. i'm not 100% when, but it happens 3 or 4? days before the event.