I think the 6th's stackage stemmed from bitterness over not being invited to the private line battle on Sunday =P. Next time around we'll try and spread our forces out more evenly along the team.
Also, do note that we had 3 "randomers" in our teamspeak channel that actually followed orders, the rest were 6th. During the third round we had another 8 random cav people with us that were not on teamspeak, werent listening to orders and generally made the UK cav very overpowered. We told them to bug off or join the other team, but in the frenzy that is communication during an event, we had no chance.