I've read places that 5 boxers are having problems with getting the same dungeon twice and not being able to kill the bosses again (unless this was fixed). I've also read that as long as 1 person in the group has not completed it then the bosses spawn once again. So does this technically mean you can start your group with 4, kick someone and invite your 5th and the bosses will still be there?

Just looking for a quick answer as i'm slowly closing in on heroics time.